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mining the moon? dream on
Mining the moon is probibitively expensive, fantastically so. The legal issues are irrelevant. It costs millions to get a few pounds into low earth orbit. Getting to the moon and back is fantastically expensive. As a very crude analogy, imagine you're at the bottom of a 20,000 mile deep hole. This represents the earth. You have to lift yourself up ...
Posted to Explainer by zl84841g on October 22, 2008
space war
Well when we shoot down the sat some time in the next few day it will put us pass China in the starwar mode.
Posted to Recycled by jesse285 on February 15, 2008
Why Only Two Sexes
About 35 years ago, Isaac Asimov published a story about an intelligent species with three sexes. To make it work he had to set the story in a universe where the basic constants of physics were different from ours.
Posted to The Sex Issue by Howard S. on October 3, 2007
Sex on Other Planets
It is possible that as we discover life on other planets, where evolution could have taken a much different path than on Earth, we will find creatures with more than one sex. Having two sexes increases the chances for genetic diversity. For example, in some animal species, all males must leave the herd after puberty to find mates from other ...
Posted to The Sex Issue by KnowItAll on October 2, 2007
Re: CFC's
Danwill:Yes , the CFC based foam was far superior .First, there have been problems with foam loss since almost the beginning: http://www.astronautix.com/articles/thespace.htm Second, CFCs were replaced with HCFCs, but not for parts of the tank that are manually sprayed, which is where most of the problems are. NASA has a waiver to use CFCs in ...
Posted to Explainer by waldo on September 11, 2007
Idea for shuttel foam falling problem
Instead of making the foam stronger (so they don't fall ever) why don't we make it weaker (so they don't damage anything during launch) but strong enough not to fall before launch? I am starting a wiki for this idea. http://spaceshuttlefoalfalling.wetpaint.com/ Please contribute if you are interested.
Posted to Explainer by Zuolan on August 31, 2007
Space Shuttle Foam Application The Key
It seems that there are more ways to insulate the liquid hydrogen than foam on the outside. Have the overly educated college bred professionals at NASA even considered any other way? Why couldn't the inside be lined with some form of insulation prior to completing the tank assembly or make it clamped together for repeated inspection and relining? ...
Posted to Explainer by Watcher49 on August 14, 2007
Farscape got it right too...
Please forgive me, but I just had to throw this in. The Science Fiction series Farscape got it right too. John Crichton in one of the many episodes in which he attempts to escape from the questionably evil and, oddly enough, sexy Scorpius, flees from someone, an alien (who happened to be played by Ben Browder's wife in real life), who is ...
Posted to Explainer by loca negra on August 9, 2007
Space Does Not Feel Cold, Fool...
Of all the silly misconceptions about space, constantly reinforced by incompetent science fiction and sloppy journalists, the worst is ''you would freeze in space because it's minus two hundred degrees''. The temperature in space, hot or cold, does not matter, for the same reason that you, if really dedicated to your caffeine addiction, put ...
Posted to Explainer by kazvorpal on August 7, 2007
Space communities
In large space communities in the future, there will be gravity and no need for pressurized suits, a much more ''normal'' life. Serious work to this end is doable and being done now, done by groups such as the Space Settlement Committee of the National Space Society, my Space Social-Political Project, and a host of others in government and ...
Posted to Explainer by diffenbach on August 2, 2007

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