Showing posts with label NASA. Show all posts
Showing posts with label NASA. Show all posts

Can we create a durable future?

SUBHEAD: We build buildings now as if they will be abandoned or torn down in a few decades.

By Kurt Cobb on 11 June 2017 for Resoruce Insights -
(http://resourceinsights.blogspot.com/2017/06/can-we-create-durable-future.html)


Image above: The Roman Colosseum today, almost two millennia  after it was built. From (http://www.abc.net.au/news/2015-03-10/the-colosseum/6292532).

It is hard to imagine anyone today building something as durable as the Roman Colosseum. Most of the damage we see to the 2,000 year-old stadium comes from two earthquakes and the persistent looting of its marble, stone and brass infrastructure by humans using them for other building projects.

Were it not for these unfortunate depredations, the Colosseum might be largely intact today.

We pen fantasies about the durability of our culture in science fiction novels, television programs and movies set hundreds and even thousands of years from now. By then we humans will supposedly be moving with magical ease at speeds greater than light, zipping through the known universe aided by voice-command convenience (or maybe even thought-comand convenience).

But our age seems to be populated by buildings and cultural artifacts that are designed for impermanence. It's not that we are technically incapable of making things that are durable when we want to, especially when it feeds our desire to turn science fiction into fact.

NASA's Mars Rovers launched in 2003 were designed for a mission of 90 Martian solar days. The Spirit rover operated until 2010. The Opportunity rover is still operating.

We have even more impressive longevity from the Voyager 1 and Voyager 2 space probes sent in 1977 to study the outer planets, that is, Jupiter, Saturn, Uranus and Neptune. Both spacecraft were designed for 5-year lifetimes and both are still working after almost 40 years.

Voyager 1 has reached interstellar space where it continues to send back data. Voyager 2 will join it in two or three years. NASA expects to continue to receive data for another decade or so from both.

On Earth we would consider such durability to be over-engineering, too costly for our purposes. We build computers to be obsolete in less than 2 years.

We build shopping malls, office parks and other commercial and industrial buildings with the idea that they will be abandoned or torn down in perhaps two or three decades.

I am reminded of a New Yorker cartoon in which a developer looking at a model of his newly commissioned building remarks:
"Great design, but when it comes time, a bitch to implode."
Nothing lasts forever. And, a society that has no dynamism, that does not change with changing circumstances, cannot survive.

But it is we who are creating the change that we have to adapt to. It is we humans who are causing climate change. It is we humans who are causing rapid depletion of soil, water and energy resources. It is we humans who are increasing our environmental footprint in sheer numbers and in consumption per person.

We've initiated a feedback loop that has no end--except catastrophe. What would more durable arrangements look like? If we turn to those arrangements that have withstood the test of time, we have a starting point:
  1. Small units of governance. The city of Rome has been continuously inhabited for more than 2,500 years. The Roman Empire, for all its durability, came and went even as the city lived on.

  2.  Small-scale agriculture and craft. Agriculturally based villages with craft industry have thousands of years behind them. This way of living is being crushed by modern industrial farming and its need for ever increasing scale. But the local food movement and the desire of many to know where their food comes from have breathed new life into small-scale farming.

  3. Trade in luxury goods. Some exotic and valuable items have long been traded across large distances because a particular climate is suitable for certain produce, for example, tea or coffee--or the know-how and infrastructure is well-developed, silk from China, for example. What this point implies is that necessities are better produced closer to home to ensure a continuous and adequate supply.

  4. Locations favorable to agriculture and navigation. It should be no surprise that many of the world's most important and long-lived cities are ports. Water has been historically a primary mode of transport. It is also, of course, essential to prosperous agriculture, either from adequate rains or from flowing rivers that can be diverted for irrigation.
All of these will seem obvious to anyone who has thought about the topic, sometimes through the lens of what is called "relocalization." In its simplest form this merely means returning the production of daily necessities closer to where we live.

That seems straightforward enough; but the complex webs of trade and logistics we now have that bring us those necessities will be difficult to abandon.

For those wanting to build more durable arrangements, this implies building them alongside the global system we have now. (It does NOT, however, mean abandoning the knowledge we have gained in the industrial age, but rather using it more wisely to attain our goals.)

Building a relocalized system may seem unduly duplicative and wasteful.

And, it will be until it isn't, that is, until the global system stops serving our needs. In many ways that system already has stopped serving us if you count as one of our needs the desire to build a durable human culture that can thrive far into the future.

The fantasy of a space-faring society has us fixated on an ever evolving technological future that asks us to abandon one set of gadgets for another almost continuously--all premised on the availability of unlimited resources and a climate crisis that somehow won't turn out to be a crisis.

Few people are even contemplating the need to build a durable society because few imagine ever needing one.

We humans like the novelty afforded to us by our rapidly changing society. The world of information and communications technology has brought that novelty to us in addictive oversupply through ever more powerful cellphones and other electronic devices.

What strikes me about this supposed novelty is its overwhelming sameness. It seems like novelty largely because new participants appear. But it is actually monotony itself because the stories we are told are as relentlessly interchangeable as they are shallow.

The durable society is not a dull society. It is rather a deeper society.

We get to spend more time with the very landscape of our lives--the people, the buildings, the everyday objects, and the activities--than the frantic pace of the electronic message now allows us.

The slow food movement is one expression of this desire for deeper engagement.

That deeper engagement is really the foundation of a durable future. It should come as no surprise then that it is difficult to build a durable future in a world that people don't have time to understand...with others they don't really know.

Kurt Cobb is an author, speaker, and columnist focusing on energy and the environment. He has been a regular contributor to the Energy Voices section of The Christian Science Monitor and is author of the peak-oil-themed novel Prelude.  He maintains a blog called Resource Insights and can be contacted at kurtcobb2001@yahoo.com.

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Last Man on the Moon

SUBHEAD: Astronaut Eugene Cernan has died at 82. He was the last man to walk on the moon.

By Xeni Jardin on 16 January 2017 for Boing Boing -
(http://boingboing.net/2017/01/16/astronaut-eugene-cernan-last.html)


Image above: Eugene Cernan aboard the Apollo 17 Command Module covered in moon dusted spacesuit on way back to Earth. From original article.

"We leave as we came, and, God willing, we shall return, with peace and hope for all mankind."

These were the last words Eugene Cernan said upon leaving the surface of our moon, at the end of Apollo 17.

Cernan (shown below at the beginning of EVA 3) was the last man to walk on the moon. He died Monday, January 16, 2017 surrounded by his family.


Image above: Eugene Cernan, with Earth overhead, during moonwalk during last NASA mission to moon in 1972. From original article.

From the NASA remembrance:
Cernan, a Captain in the U.S. Navy, left his mark on the history of exploration by flying three times in space, twice to the moon. He also holds the distinction of being the second American to walk in space and the last human to leave his footprints on the lunar surface.
He was one of 14 astronauts selected by NASA in October 1963. He piloted the Gemini 9 mission with Commander Thomas P. Stafford on a three-day flight in June 1966. Cernan logged more than two hours outside the orbiting capsule.

In May 1969, he was the lunar module pilot of Apollo 10, the first comprehensive lunar-orbital qualification and verification test of the lunar lander. The mission confirmed the performance, stability, and reliability of the Apollo command, service and lunar modules. The mission included a descent to within eight nautical miles of the moon's surface.
In a 2007 interview for NASA's oral histories, Cernan said, "I keep telling Neil Armstrong that we painted that white line in the sky all the way to the Moon down to 47,000 feet so he wouldn't get lost, and all he had to do was land. Made it sort of easy for him."

Cernan concluded his historic space exploration career as commander of the last human mission to the moon in December 1972. En route to the moon, the crew captured an iconic photo of the home planet, with an entire hemisphere fully illuminated -- a "whole Earth" view showing Africa, the Arabian peninsula and the south polar ice cap. The hugely popular photo was referred to by some as the "Blue Marble," a title in use for an ongoing series of NASA Earth imagery.


Image above: Iconic photo of whole Earth taken by Eugene Cernan during Apollo 17 mission, the last voyage to the moon. From original article.


Video above: NASA film of Eugene Cernan singing "Merry Month of May" while moonwalking. From (https://youtu.be/8V9quPcNWZE).

See also:
  .
The Gobbler: Moonshot Part One 9/21/94
A rocky road to the Cape Canaveral.

The Gobbler: Moonshot Part Two 9/21/94
Up close to a Saturn V Rocket.

The Gobbler : Moonshot Part Three 9/21/94 
NASA's first launch to the Moon.

Jupiter's moons and NASA's Juno

SUBHEAD: Humankind can send a spacecraft 600 million miles to explore Jupiter but can't save itself.

By Alan Bates on  10 July 20116 for The Great Change -
(http://peaksurfer.blogspot.com/2016/07/jupiters-moons-juno.html)


Image above: Illustration of Juno spacecraft in orbit around Jupiter. From (http://spaceflight101.com/juno/juno-mission-trajectory-design/).

NASA’s Jupiter mission, having achieved orbit around the gas giant that is likely to be the earliest planet in our system, provides fodder for many fantasies of science and fiction. 

We are such a great species of animals, you know? Look at what we’ve done. Think of all the new knowledge we will derive from this mission. Think of the gizmos.

The real finds of the mission will probably not come from the giant itself but from its 67 moons, or others that may be discovered before the Juno spacecraft swan dives into Jupiter’s gas clouds on February 20, 2018, on its 37th orbit.

Moons like Europa, with silicate surface and water-ice crust, an atmosphere composed mainly of oxygen, and gravity about one sixth of ours, have offered writers and poets scenic backdrops since Galileo Galilei first glimpsed that moon’s profile on January 6, 1610. 


It is a pretty cold place, about minus 170 C (-274 F) most days. With that low gravity, perhaps it’s a bit easier than on Earth to hop around to try to stay warm.

Suppose, just suppose, that NASA discovers something truly provocative. Suppose on one of those moons there is evidence not only of oxygen-breathing, water-loving life similar to our own, but indisputable evidence of prior advanced civilizations. 


Suppose we were given to understand that they rose and fell by their own hand, either through their own induced runaway climate change or through the unleashed horror of their own unique weapons of mass destruction. How would that knowledge affect us?


Our guess: probably not much.

To be sure, it would be the news story of the year, even the decade. It would sell a lot of ink, make for plenty of new films and performances — all the ways we tell ourselves what is going on, with ourselves at the center. But would it change the political realities of climate change, nuclear weapons or self-destruction by overpopulation? 


Probably not.

Sages would bemoan our human inability to grasp the existential threats felt by the ancient Ioans or Europans, much as they do now. Skeptics would poke holes in the evidence, much as they do now. 


Many conferences would be held in posh hotels in scenic locations. Books would be written, eloquently imploring us to take these lessons to heart. In the end, none of that would matter. 

The news would fade from the headlines, and then from the back pages. Threads would still be found in history books and online discussion groups, but for the most part, we would be back to where we were in almost no time, and none the wiser.

Why?

Because we are humans. The ‘sapiens sapiens’ appellation is a bit of hubris. We are really not that bright as vertebrates or mammals go. We soil our own nest, sacrifice the patrimony of our young to our passing pleasures, are easily attracted to shiny things and addicted to sweets. As planetary citizens we tend to be more like planetary sociopaths. 


We’ll exterminate any other species that we decide we don’t like, or have a hunger for, or don’t even think about, regardless whether it matters in the greater scheme of things. Besides, we don’t really get the greater scheme of things, even though we pretend we do.

The aliens of Europa could pack their whole sordid history onto the NASA transmitters aboard Juno and we would tell each other, oh yeah, that was an episode of Star Trek in 1964.

We are too jaded to be able to listen now.

If someone is right now hard at work crafting some message in a bottle—a dire warning to a race of future alien beings who may some day come to Earth and assay that layer of radioactive plastic in seafloor sediment that traces the ascent of Man — we’d say why bother? 


What makes you think alien explorers would be any more alert than we, who have known the dangers of the atomic Pandora since Einstein and the inevitable result of greenhouse warming since Arhennius?

Either you have the ability to behave appropriately or you don’t.

There is inescapable irony in the admission that our race is able to send a spacecraft 600 million miles to explore a large planet and its moons but is unable to muster the collective will to save itself from itself.



Video above: Video of Juno spacecraft's flight from Earth to intersect the orbit around Jupiter. From (https://youtu.be/sYp5p2oL51g).

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Bar-B-Que Kauai Style

SOURCE: David Ward (ward.david7@gmail.com)
SUBHEAD: Electromagnet radiation from military, scientific and aerospace operations may be affecting the health of Kauai.

By Stewart D. Simonson on 23 September 2015 for Dark Matters a Lot -
(http://darkmattersalot.com/2015/09/23/bar-b-que-hawaiian-style/)

[IB Publisher's note: Below are parts of two articles recently posted on the site Dark Matters a Lot that indicate that a great deal of electromagnet radiation from military, scientific and aerospace operations may be affecting the health of people on Kauai and damaging the environment on the land and in the sea.]

http://www.islandbreath.org/2015Year/09/150928parkingbig.jpg
Image above: The view from the visitor's parking area of the dome provides high-power, high gain pulsed electromagnetic radiation from AN/FPS-117 control radar station. Click to enlarge. From original article.

Above is the parking area at the west (or first) Kalalau Valley Lookout in Kokee State Park. The nearby station, seen in the mist, scatters unhealthy radiation into the surrounding area.

The safe distance from the Kokee AN/FPS-117 radar is calculated to be 530 meters (or 1730 feet). Visitors in the parking lot are only 900 feet or less from this radar. This "safe" distance is based on average power, FCC does not even address peak pulsed power, which I believe is worse. See page 28 (http://fsims.faa.gov/wdocs/orders/ps_orders/a_3910.3b.pdf)

http://www.islandbreath.org/2015Year/09/150928anfps117big.jpg
Image above: Detail from page 27-28 from FAA report referenced above showing safe distance to stand near the from the Kokee AN/FPS-117 radar station to be 530 meters. 

http://www.islandbreath.org/2015Year/09/150928birdseyebig.jpg
Image above: Aerial view from GoogleEarth the Kalalau Lookout and AN/FPS-117 radar station.The station is only 800 feet from the center of the lookout parking lot. Half the safe distance recommended. From GoogleEarth by Juan Wilson. Click to enlarge.



Shock Talk
SUBHEAD: KKCR radio guests Terry Lilley & Stuart Stevonson discuss potential health and environmental effects of microwave tower radiation on Kauai.

Host Dr. Donna Caplan on 21 September 2015 for KKCR - 
(http://darkmattersalot.com/2015/09/22/shock-talk/

To hear this show click on original link here (http://www.kkcr.org/archive/ht092115.mp3) , or  here (www.islandbreath.org/2015Year/09/150921kkcrshow.mp3).


Image above: Aerial view from GoogleEarth the Kalalau Lookout and AN/FPS-117 radar station.The station is only 800 feet from the center of the lookout parking lot. Half the safe distance recommended.

Our data and reef surveys indicate this disease/disassociation may be due to electromagnetic damage caused by chronic low level electrical currents from nearby high power, high gain antennas and radar stations inducting and conducting into the nearby shallow, conductive seawater.
- Terry Lilley.


Image above: Dead 500 year old mound coral on north shore of Kauai is now a typical site.
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Tropical forests & Climate change

SUBHEAD: NASA finds tropical forests absorbing more carbon dioxide than previously thought .

By Nadia Prupis on 4 January 2015 for Common Dreams -
(http://www.commondreams.org/news/2015/01/04/nasa-tropical-forests-key-fighting-greenhouse-gases)


Image above: Photo of tropical forest. From original article. Photo by Leonard S. Jacobs.

Tropical forests have emerged as a crucial factor in the fight against climate change, according to a new NASA-led study published Friday which finds that they are absorbing carbon dioxide at a far higher rate than previously thought.

As atmospheric levels of greenhouse gases have continued to rise, tropical forests, like those found in Malaysia, have been absorbing roughly 1.4 billion metric tons of carbon dioxide out of a total global absorption of 2.5 billion, NASA found.

Those rates are not only higher than previously estimated, they are also higher than those of the vast boreal forests found in northern regions like Canada and Siberia—which are diminishing.

"This is good news, because uptake in boreal forests is already slowing, while tropical forests may continue to take up carbon for many years," said Dr. David Schimel, NASA Jet Propulsion Laboratory senior research scientist and lead author of a paper on the study.

Forests use human-made emissions to grow faster, which in turn reduces the amount of carbon dioxide in the atmosphere—an effect known as carbon fertilization. They also remove up to 30 percent of airborne human emissions through photosynthesis. If those processes slowed down, the rate of global warming would increase.

Why was it important to determine which kind of forest are more adept at that process?
Because the answer "has big implications for our understanding of whether global terrestrial ecosystems might continue to offset our carbon dioxide emissions or might begin to exacerbate climate change," said Britton Stephens, co-author of the study and a scientist at the National Center for Atmospheric Research.

Schimel added, "All else being equal, the effect is stronger at higher temperatures, meaning it will be higher in the tropics than in the boreal forests."

The problem lies in other harmful impacts of climate change that also affect forests. Warming temperatures decrease water availability and increase larger and more frequent wildfires—which, in turn, release large amounts of carbon into the atmosphere.

Still, NASA's discovery is largely auspicious. "What we've had up till this paper was a theory of carbon dioxide fertilization based on phenomena at the microscopic scale and observations at the global scale that appeared to contradict those phenomena," Schimel said. "Here, at least, is a hypothesis that provides a consistent explanation that includes both how we know photosynthesis works and what's happening at the planetary scale."

The study is groundbreaking in its methodology, as it is the first to use a variety of models, technology, and data to create an "apples-to-apples" comparison carbon dioxide estimates between forests, NASA explained.

By using computer models of ecosystem processes, inverse models of atmospheric concentrations, satellite images, and other data and analysis, the researchers were able to determine the accuracy of their results "based on how well they reproduced independent, ground-based measurements."

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NASA "saucer" test at PMRF

SUBHEAD: Vehicle with giant 'puffer fish' parachute takes flight in $150m experiment over Hawaii.

By AP Staff on 29 June 2014 in The Guardian -
(http://www.theguardian.com/science/2014/jun/28/nasa-launch-saucer-vehicle-parachute-hawaii-mars)


Image above: Artists rendering of NASA's Low-Density Supersonic Decelerator after takeoff. From (http://www.nbcnews.com/science/space/look-out-mars-nasa-gets-its-flying-saucer-ready-launch-n120741).

[IB Publisher note: Kicking of the season of RIMPAC is a "flying saucer" experiment for landing men on Mars. Maybe before invading another planet we should figure out how to live on the one we're designed for. That certainly won't flow from the kind of activity the US Navy coordinates during RIMPAC.]

A saucer-shaped Nasa vehicle launched by balloon high into Earth's atmosphere splashed down in the Pacific Ocean on Saturday, completing a successful test of technology that could be used to land on Mars.

Since the twin Viking spacecraft landed on the red planet in 1976, Nasa has relied on the same parachute design to slow landers and rovers after piercing through the thin Martian atmosphere.

The $150m experimental flight tested a novel vehicle and a giant parachute designed to deliver heavier spacecraft and eventually astronauts.


Despite small problems such as the giant parachute not deploying fully, Nasa deemed the mission a success. "What we just saw was a really good test," said Nasa engineer Dan Coatta with the Jet Propulsion Laboratory in Pasadena, California.

Viewers around the world with an internet connection followed portions of the mission in real time thanks to cameras on board the vehicle that beamed back low-resolution footage. After taking off at 11.40 am from the Pacific Missile Range Facility on the Hawaiian island of Kauai, the balloon boosted the disc-shaped vehicle over the Pacific. Its rocket motor then ignited, carrying the vehicle to 34 miles (55km) high at supersonic speeds.

 
The environment at that altitude is similar to the thin Martian atmosphere. As the vehicle prepared to drop back the Earth, a tube around it expanded like a Hawaiian puffer fish, creating atmospheric drag to dramatically slow it down from Mach 4, or four times the speed of sound.

Then the parachute unfurled and guided the vehicle to an ocean splashdown about three hours later. At 110 feet (33 meters) in diameter, the parachute is twice as big as the one that carried the one-tonne Curiosity rover through the Martian atmosphere in 2011.


The test was postponed six times because of high winds. Winds need to be calm so that the balloon does not stray into no-fly zones.


Engineers planned to analyze the data and conduct several more flights next year before deciding whether to fly the vehicle and parachute on a future Mars mission.

"We want to test them here where it's cheaper before we send it to Mars to make sure that it's going to work there," project manager Mark Adler of the Nasa Jet Propulsion Laboratory said during a pre-launch news conference in Kauai in early June.

The technology envelope needs to be pushed or else humanity won't be able to fly beyond the International Space Station in low-Earth orbit, said Michael Gazarik, head of space technology at NASA headquarters.

Technology development :is the surest path to Mars", Gazarik said at the briefing.

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Wandering jet stream & polar vortex

SUBHEAD: Global warming of the arctic may be causing jet stream to lose its way southward.

By SCott Neuman on 16 February 2014 for NPR.org -
(http://www.npr.org/blogs/thetwo-way/2014/02/16/277911739/warming-arctic-may-be-causing-jet-stream-to-lose-its-way?sc=17&f=1001)


Image above: When the jet stream interacts with a Rossby wave, as shown here, the winds can wander far north and south, bringing frigid air to normally mild southern states. From NASA/GSFC.


Mark Twain once said: "If you don't like the weather in New England now, just wait a few minutes."

He was making an unknowing reference to the , which drives the weather over North America and Europe like a high-altitude conveyor belt. But increasingly, the jet stream is taking a more circuitous route over the northern latitudes, meaning weather systems hang around longer than they used to. And a warming Arctic is probably to blame, says , a professor at Rutgers University's Institute of Marine and Coastal Sciences.

Francis — who says it's too early to know if the well-established Arctic warming is caused by man or some natural phenomenon — was speaking during a session on Arctic change at the annual meeting of the American Association for the Advancement of Science in Chicago on Saturday.

The wayward jet stream could account for the persistently severe winter weather this year in the U.S. and Britain, as well as California's long drought.

In all of the talk recently about the "," you've already heard some of this. But as explains:
"The strength of the jet stream is directly proportional to the difference in temperature between the poles and the tropics. When it's strong, the jet stream tends to take a straighter path, but when it's weak it meanders. As the Arctic is experiencing warming at faster rates than the tropics, that difference is getting smaller, so the jet stream is weakening along with it.
"What that means for mid-latitudes, where Britain [and the U.S. are] located, is weather that stays in place for longer. Weather patterns will be more likely to get 'stuck' over a location, yielding long periods of rain and sun rather than Britain's traditional 'changeable' skies."
"The temperature difference between the Arctic and lower latitudes is one of the main sources of fuel for the jet stream; it's what drives the winds. And because the Arctic is warming so fast, that temperature difference is getting smaller, and so the fuel for the jet stream is getting weaker," Francis says. "When it gets into this pattern, those big waves tend to stay in the same place for some time. The pattern we've seen in December and January has been one of these very wavy patterns.

"It doesn't mean that every year the U.K. is going to be in a stormy pattern," she adds. "Next year you could have very dry conditions, and for that to be persistent. You can't say that flooding is going to happen more often. Next year may be dry, but whatever you get is going to last longer."

Mark Serreze, the director of the U.S. National Snow and Ice Data Center, was on the panel along with Francis. He says the idea that changes in the polar north could influence mid-latitude weather, was a new and lively area of research.

"Fundamentally, the strong warming that might drive this is tied in with the loss of sea-ice cover that we're seeing, because the sea-ice cover acts as this lid that separates the ocean from a colder atmosphere," Serreze says.

"If we remove that lid, we pump all this heat up into the atmosphere. That is a good part of the signal of warming that we're now seeing, and that could be driving some of these changes."
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Martian surface at night

SUBHEAD: Night on Mars under the Milky Way. You can even see the moon Phobos in the night sky.

By Cory Doctorow on 16 December 2013 for Boing Boing -
(http://boingboing.net/2013/12/16/panoramic-image-of-curiosity-r.html)

http://www.islandbreath.org/2013Year/12/131217roverbig.jpg
Image above: Still image from panaorama below. View looking north to Milky Way. 

Jeffrey sez, "360Cities' intrepid member Andrew Bodrov, stitching master of interplanetary awesomeness, has constructed this composite image (i.e. 'fake view') of the Curiosity Rover at night under the Milky Way. You can even see Phobos, Mars' own moon in the night sky."


Panorama above: View of mars at night taken by the NASA rover Curiosity. Assembled by Andrew Bodrov.  From (http://www.360cities.net/image/mars-panorama-curiosity-night)

See also:
360 City: Daytime view of Mars
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Mars Water

SUBHEAD: NASA's Curiosity Rover finds evidence of water worn pebbles in ancient stream bed.

By Craig Kanalley on 27 September 2012 for Huffington Post  -
(http://www.huffingtonpost.com/2012/09/27/mars-water-stream-curiosity-nasa_n_1920402.html)



Image above: Small pebbles created by running water during erosion on Mars. From (http://www.huffingtonpost.com/2012/09/27/mars-stream-photos-images_n_1920770.html#slide=1576820).

The Curiosity Rover has found evidence of an ancient stream that flowed "vigorously" on Mars where the Rover is now exploring, NASA said on Thursday.

NPR reports that this is "definitive proof" that water once existed on Mars.

Stream bed gravels were observed among the rocks on the surface of Mars, according to a statement from NASA.

"From the size of gravels it carried, we can interpret the water was moving about 3 feet per second, with a depth somewhere between ankle and hip deep," said Curiosity science co-investigator William Dietrich of the University of California, Berkeley.

The rock outcrop was named "Hottah" after Hottah Lake in Canada's Northwest Territories, per The Scientific American.

Reacting to the news, American astrophysicist Neil deGrasse Tyson wrote in an email to The Huffington Post:
"As a scientist, it's always a good feeling to obtain confirming evidence for something you had strongly suspected was true. Curiosity has just taken us there. But it's an even better feeling to find evidence that conflicts with long-held ideas. Over its usable life, Curiosity will almost surely take us there too."
Space.com adds that the discovery doesn't just mean there was water on Mars, but that it flowed in "large volumes" at one time.

Click here for photos released by NASA pertaining to this discovery.

Landing on Mars

SUBHEAD: Today, science willing, Curiosity rover lands on Mars. Here's how to watch.  

By Jeni Jardin on 5 August 2012 for Boing Boing -  
(http://boingboing.net/2012/08/05/today-science-willing-curios.html)  

[IB Editor's note: Curiosity, the first full-fledged mobile science laboratory sent to a distant world, was scheduled to touch down inside a vast, ancient impact crater on Sunday at 7:31 p.m. Hawaiian time ( Sunday at 10:31 p.m. Pacific time/1:31 a.m. Eastern Daylight Savings time or 0531 GMT on Monday).]

 
Image above: NASA hovercraft lowering rover Curiosity onto Martian surface. Still from animation below.

 
This is it, guys. Tonight's the night. NASA's Mars Science Laboratory rover Curiosity will attempt to land on the surface of Mars today. Here is Boing Boing's guide for how to follow her descent. Spaceflight Now's coverage should be excellent.

Here's an excellent history of human exploration of the red planet, by Miles O'Brien, and here's his report for PBS NewsHour chronicling Curiosity's long, strange trip.
 

Video above: NASA animation of Curiosity's trip to Mars. From (http://youtu.be/BudlaGh1A0o).
 
Here's a photo gallery of Curiosity, during construction a year ago inside JPL. Here's my interview with JPL's Ashwin Vasavada, describing the science behind this amazing venture.

 
Image above: Rear of the Curiosity rover in NASA clean-room showing the radioisotope thermoelectric generator that supplies power to rover. From (http://boingboing.net/2011/04/06/nasa-mars-science-la.html#previouspost). We liked the solar powered rovers of the last mission better. 

Science willing, I'll be at JPL tonight, and I'll send transmissions to the home blog. This is a wonderful and historic day for our exploration of the universe. I'm so happy to be alive to witness it.

Watch live streaming video from spaceflightnow at livestream.com


Video above: Live commentary from NASA that will include Mars Rover mission 8/5/12. From (http://www.livestream.com/spaceflightnow/share).

   
Video above: Live commentary from NASA that will include Mars Rover mission 8/5/12. From (http://news.nationalgeographic.com/news/2012/08/120805-nasa-tv-mars-landing-rover-curiosity-science-how-watch-see/).

See also:
Ea O Ka Aina: Mars Curiosity Rover 4/8/11
Ea O Ka Aina: mars Rovers 5th Anniversary 1/3/09
Island Breath:Mars Rover Spirit 1/22/04

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Perpetual Ocean

SUBHEAD: Computer animation from recent data of Earth's ocean currents is downright hypnotic. By Sara Laskow on 27 March 2012 for Grist Magazine - (http://grist.org/list/this-ocean-climate-model-is-downright-hypnotic/) Image above: Still from NASA video below of ocean currents at the 1':21" mark showing Japan in July 2007..

Last year, a group of NASA scientists and animators put together this animation of the world’s ocean surface currents, based on ocean flow data for June 2005 to December 2007. The video starts over the Atlantic, and as the globe rotates, you can see the whorls and waves dancing across the ocean, the relative calm of the Pacific, and the stillness around Antarctica. It’s dazzling an hypnotic. We really should be posting this on a Friday afternoon:

Video above: NASA animation of recent data on ocean currents titled "Perpetual Ocean". From (http://youtu.be/0B1xYBRQ3qE). The tool NASA used to make the visualization — ECCO2 or Estimating the Circulation and Climate of the Ocean — actually has a greater purpose than providing entertainment for stoners. The tool “attempts to model the oceans and sea ice to increasingly accurate resolutions that begins to resolve ocean eddies and other narrow-current systems which transport heat and carbon in the oceans.” In other words, it’s the sort of model that can help scientists understand how carbon concentrations and climate change will affect the planet. It just happens to also look extremely cool.

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NASA spots Elenin Comet

SUBHEAD: NASA sun-watching satellites turned to spot comet Elenin approaching from deep space.

 By Staff on 11 August 2011 for Space.com - 
(http://www.space.com/12603-comet-elenin-photo-nasa-stereo-spacecraft.html)

 
Image above: Elenin image produced by solar observation Earth orbit satellite. From original article.
 
A NASA spacecraft aimed at the sun shifted its unblinking gaze to an approaching comet last week to snap a new photo of the icy object as it flew by.

The image shows the comet Elenin as it passed within 4.3 million miles (7 million kilometers) of one of NASA's twin Stereo sun-watching spacecraft during a series of deep space photo sessions that began on Aug. 1. NASA rolled the Stereo-B satellite to give its instruments a view of the comet flyby, officials said.

From Stereo's observations, the fuzzy comet Elenin can be seen streaking across a small portion of the sky. The comet was seen by Stereo's HI-2 telescope between Aug. 1 to 5, and by the higher resolution HI-1 telescope between Aug. 6 to 12, NASA officials said. Stereo mission scientists planned to take photos for one-hour every day through Aug. 12. [See the Stereo probe's new comet Elenin photo]

"From August 15 onward, the comet enters the HI-1 telescope's nominal field of view, at which time we should enjoy continuous viewing of the comet," NASA researchers explained in an update posted to the Stereo mission website.

Comet Elenin is expected to become brighter over the next few days, and could be detectable using Stereo's coronagraph instrument between Aug. 20 and Sept. 1, NASA officials said. Mission managers are then expecting the comet to become visible to another sun-watching spacecraft – NASA's Solar and Heliospheric Observatory (SOHO) – for six days, beginning on Sept. 23.
Comet Elenin was discovered in December by Russian astronomer Leonid Elenin, who spotted the icy wanderer using the International Scientific Optical Network's robotic observatory near Mayhill, New Mexico.

Viewed from Earth, comet Elenin presently appears as a faint smudge of light in deep sky exposures. By late August the comet could be visible to the naked eye as a dim "fuzzy star" with a tail. [Best Close Encounters with Comets]

Comet Elenin will fly through the inner solar system in October 2011 and be 22 million miles (35 million kilometers) away at its closest approach to our planet, NASA scientists have said. The comet is not expected to be particularly dazzling, but the flyby may be a good chance to study a relatively young comet from the outer solar system.

Some doomsday theorists have pinned the Nibiru rogue planet hypothesis on the small comet.
Conspiracy theorists say a planet, known as Nibiru, will swing in from the outskirts of our solar system and collide with Earth and wipe out humanity in 2012. Since no rogue planet has been found in the outer solar system, some people have argued that comet Elenin will be the true culprit in the Nibiru-Earth collision.

NASA has dismissed the notion that comet Elenin is anything other than a dim, wimpy comet. It poses no threat to Earth, making its closest pass at a distance roughly 100 times farther than the distance from Earth to the moon.

NASA's identical twin Stereo spacecraft were launched in October 2006. They are offset from one another, one flying ahead of the Earth and the other behind. The name "Stereo" is short for Solar Terrestrial Relations Observatory.

Elenin as doomsday planet Nibiru

SUBHEAD:Believers in mysterious planet Nibiru await Earth's end on 25 September 2011.  

By Natalie Wolchover on 7 July 2011 for Space.com - (
http://www.space.com/12194-comet-elenin-planet-nibiru-doomsday-2012.html)
 
Renowned astrophysicist Carl Sagan once described a "baloney detection kit" — a set of tools that skeptical thinkers use to investigate any new concept. A few of the key tools include a healthy distrust of information that isn't independently verified, critically assessing an idea rather than becoming irrationally attached to it simply because it's intriguing, and a preference for simple explanations over wildly speculative ones.

The waxing obsession with the planet Nibiru , which conspiracy theorists say is a planet swinging in from the outskirts of our solar system that is going to crash into Earth and wipe out humanity in 2012 — or, in some opinions, 2011 — shows that an astonishing number of people "are watching YouTube videos and visiting slick websites with nothing in their skeptical toolkit," in the words of David Morrison, a planetary astronomer at NASA Ames Research Center and senior scientist at the NASA Astrobiology Institute.

Morrison estimates that there are 2 million websites discussing the impending Nibiru-Earth collision. He receives, on average, five email inquiries about Nibiru every day.

[Editor's note: See YouTube video below as an example of Elenin conspiracy theory on internet.]

   
Video above: 2012 The TRUTH You're NOT being TOLD The clock runs out Sep 25th 2011. From (http://youtu.be/scZAOQNopok).

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