For decades now, companies have been using jets of water under extremely high pressure to cut through various material, including steel. The water jet can...

I did a few calculations on what it might take to do a flyby of Alpha Centauri, so, like a fool, I propose to rush in (to this newsgroup) where angels fear to...

My impression of the long range goal of Program Constellation is the establishment of a permanent *city* on the Moon. (?). I use the term "city" instead of...

The rocket launchers are not economical because they are not reusable. When they reenter the atmosphere, their slender bodies soak up so much heat from...

I've lost count of how many times on these newsgroups I've encountered someone saying that providing space habitats with natural sunlight via mirrors and...

This is partly in answer to the Scientific American article about cosmic rays likely preventing human spaceflight. I have long believed that O'Neill colonies...

The SpaceX website's August/September update says they have a Q1 2005 paid flight, and that the Falcon I is on the launch pad at Vandenberg. It's not clear,...

How do you make a still that can process fluids in Zero-G? My first guess is that the evaporator uses some kind of mat to how the liquid being processed, but...

richie086 wrote in : Hey.. I have a question. would the use of balloons to lift...

Hello! Reading various bits of info about Mars rovers on various sites I haven't noticed (or missed?) any info about their life expectancy on the Mars...

Some methods I've seen mentioned for peroxide biprop ignition a Decompose the peroxide with catalyst pack. Pyrotechnic igniter in the chamber. Dissolve...

Would it be possible for a Voyager class probe to hitch a ride on a comet? Deep space or what? -----= Posted via Newsfeeds.Com, Uncensored Usenet News...

I lay watching Mars the other night, and I thought about how we might build a ship to take people there. In a lot of ways, we are like ancient man right after...

There are reasons why it's advantageous to have a main lunar base at low latitude, and a water mining base at the poles. But how could cargo be transported...

Is there some nice concise source for the ISPs of nuclear thermal rockets using various working fluids, like ammonia or methane? I thought I had a method of...

There's gobs of O2 on the Moon (~40% by mass of the Moon's surface is oxygen), but hydrogen is still needed to make water (remember, the poles are a long way...

I'm wondering if this idea has occurred anywhere else: If humans need a full one Earth gravity after all, a lunar settlement could provide that, at least part...

I thought I understood basic gravity problems but the following high school physics problem from my daughter has me stumped ( I think) Q. a disabled ( meaning...

TransOrbital applied to the State(?) Dept. for their license to land a mission on the lunar surface. Realizing that a mission is held up until such a license...

Specific heat of water = 1.0 BTU/lbs/F Latent heat of fusion of water = 140. BTU/lbs Latent heat of evaporation of water = 970. BTU/lbs Initial water...