My questions concerns the gravity gradient on an orbiting tether, let's say 1,000 km long. The center of mass for the tether would determine its orbital...

Hello I am looking for information about greenhouse experiments in space. I have found lots of information on the NASA web, but mostly useless (at least in...

Does anyone use an engine burning H2O2 with O2? Just wondered what those characteristics might be. Thanks, Matt Bille ) OPINIONS IN ALL...

I noticed the bail type catalyst packs that the Armadillo team are using. Apparently the coatings just blow right off. Electroplating might be the answer but...

I had posted awhile back looking for a laptop and hard drive that could work at 30,000ft. I found a suitable hard drive at www.mt-optech.com.....just wanted...

Hard drives on 'Deep Space' missions: any idea why they are never used? 4 x 100 Gb drives could store enough data such that it could take up to 6 months to...

http://science.nasa.gov/headlines/y2003/20aug_supercriticalco2.htm Harvesting Mars NASA Science News August 20, 2003 A NASA-supported scientist is learning...

hi, A pressure jet has venturis which use the energy in expanding propane to entrain air into a combustion chamber. a) What about using the expanding propane...

Orbital Express and some other missions have demonstrated power transfer or recharging after a hard dock. Has anyone done it with RF/ laser/other wireless...

Is there any known or guessed quantity of He3 on asteroids or dead comets? If an object has been orbitting for 4+ billion years, it should have collected some...

Anyone know the status of research on heat exchanger laser launch technology? By that I mean a vehicle that carries a propellant (maybe ammonia) that runs...

How are thermal protection systems tested on the ground? By directing superheated air at various temperatures, pressures, and durations to simulate a re-entry...

(Henry Spencer) wrote in message ... In article , John...

Hi, No flames plz, I'm not claiming to believe in any of the following, but was simply just seeking some enlightened answers. :) As you know, a couple of...

Helium-3 is abundant on the Moon but very rare on Earth There is a critical shortage of He3 today, due to two factors: 1) increasing demand for neutrons...

I am trying to build a laboratory scale thruster which uses mono propellants and is thermally ignited.Although i got few papers on net but none of them were of...

I am building a laboratory scale thruster which uses mono propellants and is thermally ignited, I am not getting much information related monoprop that...

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...

I am using Nasa CEA code for calculating Isp for different Ae/At ratios with chamber pressure of 1000 psi. Problem is Isp should have a peak at optimum...

Hi everybody, i'm trying to calculate the cooling system of a bipropellant hypergolic system, and I'd need urgently to know which is the thermal conductivity...