Showing posts with label The Planetary Society. Show all posts
Showing posts with label The Planetary Society. Show all posts

Friday, September 25, 2009

Water Found on Both Moon and Mars


September 23, 2009. NASA announches that there are small amounts of water on the surface of the moon. For years, scientists thought that previous spacecraft might have had slight contamination from Earth and had sent back misleading indications that they had found water on the moon. It has long been suspected that there might be frozen ice in deep craters where sunlight never gets to them at the poles.

Planetary geologist Carle Pieters of Brown University said the following, "Widespread water has been detected on the surafce of the moon. What we're detecting is completely unexpected. The moon continues to surprise us."

Recent observations by several spacecraft such as the Indian Chandrayaan-1 satellite, NASA's Cassini, and NASA's Deep Impact probe have forced the world's scientists to reconsider what they know about the lunar surface. All three of these spacecraft detected the spectral signature of water (the wavelengths of light that it reflects) all across the lunar surface. The signal was strongest at the lunar poles. Signal strength also depended on the local lunar day.

"The entire surafce of the moon will be hydrated durning at least part of the lunar day." So says Jessica Sunshine, University of Maryland and the deputy principal investigator for NASA's Deep Impact extended mission and the co-investigator for the Moon Mineralogy Mapper(M3) which is carried by the Indian satellite Chandrayaan-1.

What form the water takes on the lunar surface is nto clear yet although several theories are now being developed. It is seeping from underground (and or former lunar underground ruins according to Richard C. Hoagland-guest Science Advisor to the Coast to Coast Am radio program).

And the findings keep coming in-the Lunar Reconnaissance Orbiter and the LCROSS impactor are set to explore the lunar south pole craters looking for water ice. The fluctuating signals seen throughout the day could indicate that the water is migrating across the surface toward colder, higher latitudes and eventually the poles.

Pieters are putting forth the theory that "If the water molecules are as mobile as we think they are - even a fraction of them - they provide a mechanism for getting water to those permanently shadowed craters."

There is similar migration seen on Jupiter's moon Ganymeded and on Saturn's moon Iapetus.

As for Mars, the news was just as good. NASA reports that its Mars Reconnaissance Orbiter spotted ice at five new Martain craters, likely kicked up by meteor impacts. Megan Kennedy of the Malin Space Science Systems of San Diego said, "We now know we can use new impact sites as probes to look for ice in the shallow subsurface."

"This ice is a relic of a more humid climate from perhaps just several thousand years ago." Shane Byrne of the University of Arizona added.

The robot exploreres on ars have found ice on the surface before. Planetary scientists have seen what might be the shores of a giant river and seas on Mars. Louis Friedman, executive director of The Planetary Society said the following, "This is a real water resource."

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REF. Reuters.com. Chris Wilson, September 24, 2009. (http://www.reuters.com/article/scienceNews/idUSN2436167620090924)
Space.com. September 24, 2009. Andrea Thompson (http://www.space.com/scienceastronomy/090924-moon-water-reaction.html).

Thursday, April 30, 2009

No Lunar Base in 2020? Say it ain't so!


New Scientist article by David Shiga that was posted on their website on April 29, 2009; suggest that NASA is backing off the idea of building a outpost on the moon.

According to acting NASA administrator Chris Scolese told congressional lawmakers on the 28th that the agency is "... open to putting more emphasis on human missions to destinations like Mars or near-Earth asteroid(s)."

While NASA is working towards the return to the moon by the year 2020, other space analysts and advocacy groups such as Planetary Society are urging NASA to cancel plans for a permanent moonbase.  They instead urge shorter moon missions, and focus on getting astronauts to Mars

Scolese's comments suggest that the White House might be undergoing a shift in space policy.  Chris Scolese was speaking to the Subcommittee on Commerce, Justice, Science, and Related Agencies of the House Committee on Appropriations.

Reporters kept asking Scolese about the 2010 budget and how it would impact the agency as it moves forward to lunar flights by 2020.  But Mr. Scolese declined to give out a clear yes or no answer.  His answers instead gives the clue that NASA's plans are in flux.  

Check out this answer he give to reporters (reguarding the short trips to moon and the asteroids).  "Recall (that) the Vision (for Space Exploration) was not just to go to the moon as it was in Apollo, it was to utilise space to go on to Mars and to go to other places.  We've demonstrated over the last several years that with multiple flights we can build a very complex system reliably - the space station - involving multiple nations.  and we'll need something like that if we're going to go to Mars."

NASA's associate administrator for exploration systems, Doug Cooke; give out similar vague answers to the subcommittee's chair Congressman Alan Mollohan wondering if the space agency has been new directions.

More specifics are explected to come out in May when the Obama administration releases it's detailed 2010 budget proposal. 

Image is of the UFO tv series Lunar Lander landing at the SHADO moonbase.

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Ref. New Scientist.com article by David Shiga. April 29, 2009 ( http://www.newscientist.com/article/dn17052-nasa-may-abandon-plans-for-moon-base.html)

Sunday, February 15, 2009

Former Astronaut Speaks Out on Global Warming


Former Astronaut Speaks Out on Global Warming
(article by the Associated Press, 02/15/2009)


AP article, Santa Fe, NM- Former astronaut Harrison Schmitt, who walked on the moon and once served New Mexico in the U.S. Senate, doesn't believe that humans are causing global warming.

“I don't think the human effect is significant compared to the natural effect,” said Schmitt, who is among 70 skeptics scheduled to speak next month at the International Conference on Climate Change in New York.

Schmitt contends that scientists “are being intimidated” if they disagree with the idea that burning fossil fuels has increased carbon dioxide levels, temperatures and sea levels.

“They've seen too many of their colleagues lose grant funding when they haven't gone along with the so-called political consensus that we're in a human-caused global warming.” Schmitt said.

Dan Williams, publisher with the Chicago-based Heartland Institute, which is hosting the climate change conference, said he invited Schmitt after reading about his resignation from The Planetary Society, a nonprofit dedicated to space exploration.

Schmitt resigned after the group blamed global warming on human activity. In his resignation letter, the 74-year-old geologist argued that the “global warming scare is being used as a political tool to increase government control over American lives, incomes and decision making.”

Williams said Heartland is skeptical about the crisis that people are proclaiming in global warming.

“Not that the planet hasn't warmed. We know it has or we'd all still be in the Ice Age,” he said. “But it has not reached a crisis proportion and, even among us skeptics, there's disagreement about how much man has been responsible for that warming.”

Schmitt said historical documents indicate average temperatures have risen by 1 degree per century since around 1400AD., and the rise in carbon dioxide is because of the temperature rise.
Schmitt also said geological evidence indicates changes in sea level have been going on for thousands of years. He said smaller changes are related to cahnges in the elevation of land masses – for example, the Great Lakes are rising because the earth's crust is rebounding from being depressed by glaciers.

Schmitt, who grew up in Silver City and now lives in Albuquerque, has a science degree from the California Institute of Technology. He also studied geology at the University of Oslo in Norway and took a doctorate in geology from Harvard University in 1964.

In 1972, he was one of the last men to walk on the moon as part of the Apollo 17 mission.
Schmitt said he's heartened that the upcoming conference is made up of scientists who haven't been manipulated by politics.

Of the global warming debate, he said: “It's one of the few times you've seen a sizable portion of scientists who ought to be objective take a political position and it's coloring their objectivity.”

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Ref. Santa Fe New Mexican, http://www.sfnewmexican.com/
http://news.bostonherald.com/news/national/general/view/2009_02_15_Former_astronaut_speaks_out_on_global_warming/srvc=home&position=recent