Probably such things have been hashed out before, but allow me to solicit the opinion of the readership on this question that has come up in some off-line...

The highest resolution Enceladus images from the orbit 3 flyby was 60m/pixel from a distance of ~10,000 km. The closest distance to Enceladus on the flyby was...

I noticed some discussion of this combination some time back. Is there any reason that rather than having separate N20 and propane tanks you can't have the...

Extended Deadline: March 10, 2005 See http://www.cs.utep.edu/~cic for details The 2005 International Conference on Communications in Computing...

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...

My 9-year-old kid made a micrometeoroid dust collector/detector in the back yard for a science fair project: it's a tarp and a big strong magnet:...

Oops... The Arcam EBM S12 fabrication speed is only about 17 cubic millimeters per second, but its scanning speed is 1 km/s. A much more powerful electron gun...

Does anyone know of a method, or a piece of software, for calculating (or at least approximating) low-thrust interplanetary trajectories? Most of what I've...

This mature fabrication technique is perfectly suited for making complex metal parts, including CHEAP ROCKET ENGINES! All you have to do is to make the CAD...

Reading the thread about cryogenic plastics, I thought it might be an idea to use (reinforced? with what?) polythene for the tanks of my LH2/LOX second stage*...

Just out of curiosity... What is the carbon-carbon heat shielding on the leading edges and nose of the Shuttle composed of? I'm assuming that part of it is...

Jim and Greg Benford are featured in _New Scientist_ http://www.newscientist.com/channel/space/mg18524846.500 along with a brief quote from me, about...

I was wondering what communications protocols have been used in the past with probes traveling beyond the earth-moon system? I've read that G-tor was used for...

There's an interesting (and long) thread over on the Space.com forums about the possibility of redesigning a reusable Gemini-style capsule with modern (mostly...

Hi. I've already used google to find an answer,but the links weren't very helpful,that's why I'm asking he Are there any good books or papers about the...

How difficult is it for a non-government group to build an effective ion thruster? The only ones that I'm aware of have been built by NASA or the ESA. I'm...

This is probably a dumb question, but... Would it be possible to use conventional jet engines to attain sufficient airspeed for scramjets to start to...

I was reading this article http://www.newscientist.com/article.ns?id=dn6925 Would this type of approach for rocket fuel be superior to those which have high...

The JANAF heat of formation for C is 711.2 kJ/mol. That's a lot. If I do the simple heat of formation at 0 K equation for a hydrogen-oxygen rocket, I...

Why can't you launch a fuel tank into orbit with solid fuel boosters that the shuttle or other transport could dock with? What about to moon orbit?. If you...