[rs79bm]

If zero gravity's obtainable here on Earth, you can imagine how certain vested interests would be substantially threatened.

I think a class in engineering or theoretical physics would do you some good. Look, earth has an atmosphere. You cannot approach zero-gravity within the earth's atmosphere. Only when you leave the atmosphere do you experience zero gravity. The moon has a smaller gravitational field than the earth, but it has an atmosphere nonetheless. That is why when the astronauts were walking on the moon, it seemed like they were in slow motion. Other planets have atmospheres, but mars is nearly identical to that of the earths. As far as zero gravity on earth, the only thing close to replicating that is by sinking astronauts in an olympic size swimming pool with their suits on. This is part of their training. If there were others ways, you could bet we would be doing it.

[Analyzing Inconsistencies]

>>>Other planets have atmospheres, but mars is nearly identical to that of the earths. <<<

Which class did you learn THAT "fact" from?

Having said that, I don't mean for that to sound condescending :-) I appreciate the noncondescending nature of your explanation to me just now.

[Analyzing Inconsistencies]

>>>If there were others ways [to generate microgravity without having to go to space], you could bet we would be doing it.<<<

Why, because NASA bureaucrats and their contractor allies seek to save taxpayers money? Presumably you're aware that the Russians launch humans into space at 1/25th of what NASA charges us, even as the Russians haven't lost anyone in space in over 3 decades?

[jettester]

FYI, one of the other methods to come close to zero-g is for it to happen like they did for filming Apollo 13 - by using a modified jet. I think the manuever is called a hyperbolic dive but zero-g's are achieved for short periods of time.