When terrestrial glaciers retreat from permafrosted terrain, the barren earth undergoes a process of reclamation involving runoff (sometimes massive),...

There has been a lot of work done on Hohman and Bielliptic transfers, but has there been anything on constant-thrust transfers? Of course, the "optimum" in...

What's the current state of the art in ion engines? How well do they do, and when one adds solar panels (or some other energy source) and such to the mix,...

Hi, Just read an article on SpaceFlightNow.com about a new ion engine being developped and tested with substantial improvements over older designs, such as...

Has anyone read this article? In an exclusive story, Av Leak claims that Rutan has modified his spacecraft to improve its stability. Burt may still make Dec...

I have a few dynamical questions, that I was hoping to get some "top line" answers to:- Suppose I want to propel a (hypothetical) 300-kg mass orbiter...

Liquid propellant rocket engines have the engine on a gimbals frame so servo motors can move the exhaust a few degrees in the X and Y axis so the rocket can be...

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...

I'm trying to imgaine cheap space flight. I'd also like to see it sooner rather than later. Given this I believe we are limited to chemical rockets. What's...

This is the weekly Frequently Asked Question (FAQ) posting for sci.space.tech and sci.space.science . It is crossposted into sci.space.policy to explain...

Hello, is there someone who can give me a list of upper stage engines currently used in launch vehicles? Thank you very much, Rob

On Feb 25 2002 John Carmack started a thread by this name. Google won't let me reply to that thread so I am starting another by the same name. John...

Hi all.... While Im sure this ISNT a new idea....I havent seen it discussed lately....so here we go... Did some web research awhile ago and found some...

Why is it that spacecraft tend to adopt nose-down attitudes for de-orbit burns? If the acceleration vector were instead precisely anti-parallel to...

http://science.nasa.gov/headlines/y2003/03dec_membranes.htm Membranes on Mars NASA Science News December 3, 2003 Thin membranes developed by NASA-funded...

David E. Steitz Headquarters, Washington December 4, 2003 (Phone: 202/358-1730) Alan Buis Jet Propulsion Laboratory, Pasadena, Calif. (Phone:...

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 see from several articles, eg. http://www.spacedaily.com/news/marsexpress-03n.html That there is an aparent velocity change from 11 Km/s to 9 Km/s in the...

Can anyone point me to a decent source for this pulsed fusion system? -- "The Union Nationale has brought to the edge of an abyss. With Social Credit you will...

This is the weekly Frequently Asked Question (FAQ) posting for sci.space.tech and sci.space.science . It is crossposted into sci.space.policy to explain...