I'm looking for citable references to the concept of a "fountain" or "dynamic compression member" concept for building towers to the edge space. The basic...

Here's one I came across: http://www.reference.com/browse/wiki/Energy_amplifier A thorium fission reactor would be classified as an 'energy...

Large rocket engines cannot be reusable because they are damaged by large Reynolds number. The Reynolds number = Re = V*D*S/N whe V = gas velocity D =...

I'm trying to guesstimate the mass budget for a Falcon 1. Public information seems to be limited at the moment, especially since SpaceX has removed its Falcon...

I've long noticed that the problem with the space industry is limited demand. With demand for only so many space shots, there doesn't seem to be a potential...

I have this idea for an orbital rocket fuel refueling station; has this idea been studied already? The refueling station is a solar powered satellite...

Does silicon have plastic deformation? And how is Silicon Stress-Strain Curve modeled.

Why were early US manned spacecraft pressurized with pure oxygen at 5 PSI when the partial pressure of oxygen at sea level is only about 3 PSI? I'd have...

Couldn't a large comet or asteroid go right through one of our lage gaseous planets (perhaps not right through the middle, to avoid an eventual hard, inner...

Burt Rutan has pioneered the concept of a rocketship that reconfigures itself for reentry and landing. I have been wondering for a while if this approach might...

I was reading about the airship to orbit idea, and how it is probably impossible. This got me to thinking, are there any materials like carbon nanotubes that...

I was reading about the airship to orbit idea, and how it is probably impossible. This got me to thinking, are there any materials like carbon nanotubes that...

One of the limiting things in Earth to orbit rockets is first stage initial thrust. The rocket engine of the first stage has to carry all the weight of the...

Do spin-stabilized satellites have attitude drift requiring periodic correction? If not, why? Even inertial navigation platforms have drift. If yes, how do...

When watching the Russian Progress docking to the ISS I see this little thing spinning. When I see it from the Progress on board camera view it looks like it...

Just out, NASA TM-2005-214014, December 2005 "Materials Refining for Solar Array Production on the Moon" This report was originally a white paper on a process...

Opportunity And Spirit approach their eighth Warranty reprise. http://antwrp.gsfc.nasa.gov/apod/ap060105.html Batteries not in; Parts settle during...

I've sent this once already, but it hasn't shown up. Sorry if it duplicates. We were discussing "Space Cadets" in work today, and someone asked if...

For a given amount of energy input, the absolute limit on the speed acheivable is set by dumping 100% of that energy into the kinetic energy of a spacecraft. ...

Hi, What is the best config for a space helmut? I've seen all kinds from google search. I like the sphere kind with a hemisphere front. The back of the head...