Correction: There are 3 kinds of buckytubes: armchair, zigzag, and chiral. Armchair buckytubes are ballistic conductors. Zigzag and chiral buckytubes are...

Why not any first stage with LH2/LOX before Delta IV? Maybe this is a dump question too but I have always wondered that: How much powerful Saturn 5 would have...

We know that beryllium heat sink heat shields can be fabricated and expected to work, based on the mercury program. The fabrication difficulties and weight...

I am looking for data on the actual CG locations for flown lifting re-entry capsules. References/pointers/whatever appreciated. Thanks. -george william...

I've recently read that a distant galaxy 11 billion light years away has been spotted. Does this mean that in actuality it was 11 billion light years away...

For long range space travel with hydrogen reaction mass... Roughly how much power is required to keep hydrogen liquified per watt of heat leakage into the...

I wonder why it is not in more common use. It is liquid at a low temp (I think around 200 C) and gives the electron off more easily than H. It should also...

My initial experiments in making parraffin fuel with bubbles of another hydrocarbon were not too successful. I had simply mixed melted parraffin with various...

Hi all.... Just wondering.... If you were putting people in rockets and "lobbing" the passenger capsule from the point of departure to the destination how...

Could Hubble, along with the NexGen space telescope operate as a long baseline optical interferometer in some way? Perhaps a reference laser beam could be...

I read a mention some time back about a (canceled) project that would have attached a long duration habitation module to the ISS. I can't remember if I read...

I have been very curious lately about the fuel cell technology, and I am interested in trying out a few demontrations on my own. I've found a few sites on the...

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...

http://www.sciencedaily.com/releases/2004/02/040212081249.htm contains: "Los Alamos Leading Fast-paced Reactor Research To Power Planned Journey To Jupiter's...

So, assuming that we can build an orbital vehicle, get a launch permit, etc - what is the best (or cheapest) method of tracking the vehicle after...

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...

The idea of reflecting sunlight using mirrors at the Earth-Sun L1 Lagrange point to reduce global warming is well established. It appears to be based on...

http://www.lowell.edu/press_room/releases/recent_releases/dct_rls.html For Immediate Release October 15, 2003 contact: Rebecca Stenholm CKPR (602) 417-0684

Hi, I wanted to mention this article I read, about a newly discovered way to reduce air resistance: http://www.physorg.com/news11095.html No flames, plz -- I...

Is it possible to be in Mars orbit and collide with Olympus Mons?