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...

I would like to have your thoughts about the best architecture for high rate lunar missions. I don't want to hear about new technology, if you want to talk...

Not long ago it looked like the Medium lift market was over-subscribed with Proton, Ariane-5, Sea Launch, Atlas-5 and Delta-IV. Now with the retirement of...

Whereas, Ames no longer supports NNTP, I'll post this note he In short: Mission Control Technologies Job Openings (4) The Mission Control technologies...

Having problems downloading http://marsrovers.jpl.nasa.gov/gallery/press/spirit/20040113a/Horizon_hills_ color-A11R1.jpg Shows it downloads but just blank...

With the source of thrust so far behind the centre of mass, large rockets would seem to be unstable in flight. So how is this overcome? I could imagine a...

No, this post is not a joke, although I wish it were. My son attends an "art" high school in Lucca, Italy. His philosophy teacher and one of his art teachers...

Once a rocket or is in space (e.g. on its way to mars), how does it know where it is in relation to its pre-programmed route? There is no GPS in space.

I was wondering what special testing and such must be done before a rocket is man-rated. Can any rocket be 'man-rated'? What does the term mean in terms of...

At http://radio.weblogs.com/0101365/2003/11/12.html is shown the blueness of a test-tubeful of LOx, and its absorption spectrum. What about a light path of...

The SpaceX website's August/September update says they have a Q1 2005 paid flight, and that the Falcon I is on the launch pad at Vandenberg. It's not clear,...

I suppose this is harder to figure out the larger and more complex any launch campaign gets, but if you take one of the smaller LEO-capable boosters (Taurus,...

Using existing technology if we were to build a Fission rocket then how much more efficient would than a Chemical rocket would it be? I believe conventional...

I have been thinking a while that how to ground a satellite or shuttle at the vacuum environment. Can someone explain this? Extra resources will be grateful...

In probing a icy moon with a probe that melts it's way down, how do you handle the dirt that accumlates in the bottom of the melt hole? If it is just dust I...

The DC-X and DC-XA VTVL demonstrators of the 1990s were originally seen as just the first steps toward an operational re-usable SSTO, the DC-1 or Delta...

The remaining sats were bought out and run by another company, immediately turned around a lucrative military comms contract and then...? What's the status of...

Hello! I've read in few articles dealing with the priorities change in NASA that HST will be let to naturally die as a result of Shuttle service missions...

First, I am a VTVL fan first but that does not mean you should not think of other possible solutions. While thinking about the problem of the weight of...

Thinking about the problem some more it seems a big problem would be landing a high speed glider onto a sled that is on tracks. This would mean that the sled...