LCROSS Impact Data Indicates Water on Moon | Hacker News Reader

LCROSS Impact Data Indicates Water on Moon

nasa.gov

50 pointsbrlewis10 comments

But Colaprete couldn't resist a further tease, saying that other features in the spectra hinted at a variety of additional chemicals. "This goes beyond the water," he said, but declined to discuss any of this additional information, suggesting that it was in the same state as the water findings were shortly after the impact—they still haven't eliminated enough possible explanations, so they can't talk about it with any confidence.

http://arstechnica.com/science/news/2009/11/nasa-announces-s... ...includes pictures of absorption spectra - anyone who can guess what lives around the other significant data points? My knowledge of chemistry is sadly lacking...

"We are ecstatic," said Anthony Colaprete, LCROSS project scientist and principal investigator at NASA's Ames Research Center in Moffett Field, Calif. "Multiple lines of evidence show water was present in both the high angle vapor plume and the ejecta curtain created by the LCROSS Centaur impact. The concentration and distribution of water and other substances requires further analysis, but it is safe to say Cabeus holds water."

Hasn't NASA announced new "breaking, clear evidence" of moon water/ ice every year for the past decade?

That's just something the mainstream media does. They distall the press releases into simple headlines. Thus some evidence for water on the moon = a headline of water on the moon.

But this time it's for real...

Is this enough information/certainty to plan future missions? Can we count on water being there to use for fuel, etc?

Or before that point will we need some kind of scout mission to figure out specifics like "there are X lbs. of water at this site in 3 ice puddles here, here, and here"? If so, how would such a mission work? Manned?

While it is good news, I still wonder when we will see an actual "moon-base" Once established, it will definitely signal a new era of space exploration. And perhaps a new era for humanity at the same time.

Maybe I read too much sci-fi...

The issue though is what are you going to do with a moon base? The moon does not hold any significant resources which are useful in the further exploration of the solar system. (Now, I don't know how much water there is on the moon, but my guess is that it isn't enough of it to justify building a moon base just for the water.)

Astroids, comets or Mars, that should be where the action is. :)

I think a large part of the justification for a moon base is that it could be used as a location from which to stage further space missions. If you construct a rocket on the moon you've got no atmosphere and a fraction of the gravity to deal with.

No atmosphere might also make it useful for astronomy, but I'm not so sure of that.

EDIT: Wikipedia, of course, has a section on this: http://en.wikipedia.org/wiki/Moon_base#Advantages

These points on their list:

A lunar base would provide an excellent site for any kind of observatory. Particular advantages arise from building observatory facilities on the Moon from lunar materials. As the Moon's rotation is so slow, visible light observatories could perform observations for days at a time. It is possible to maintain near-constant observations on a specific target with a string of such observatories spanning the circumference of the Moon. The fact that the Moon is geologically inactive along with the lack of widespread human activity results in a remarkable lack of mechanical disturbance, making it far easier to set up interferometric telescopes on the lunar surface, even at relatively high frequencies such as visible light.

A lunar base could also hold a future site for launching rockets, to distant planets such as Mars. Launching rockets from the Moon would be an easier prospect than on Earth due to the Moon's lower gravity requiring a lower escape velocity.

Due to the exponential nature of the rocket equation the most important resource needed for exploration of the Solar System is rocket fuel.

Water can be turned into rocket fuel by splitting it into Oxygen and Hydrogen. Water and Oxygen are also very important consumables in spaceflight. Moreover, Oxygen and water can be used to grow food.

It can be an order of magnitude more efficient to launch propellant from the Moon than from the Earth. Given that, it starts to make sense to launch unfueled spacecraft from Earth which fuel up with Lunar sourced propellants (and other consumables) at a depot in Earth orbit or Lunar orbit. With such a system you can use smaller, reusable launch vehicles from both the Earth and the Moon to build a self-sustaining trans-Earth exploration infrastructure, rather than continually building one-off efforts to get to Mars, the asteroids, etc.

Cross reference: http://news.ycombinator.com/item?id=940314

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