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"Tim Tyler" wrote: Still, maybe ringworld - along with "solid" Dyson spheres - is still too far out for serious discussion ;-) Well,...

I've looked moderately hard, so don't prang me please if the source is too obvious: does anyone know where I can get images of a 50's ion-propelled spacecraft...

This is the weekly Frequently Asked Question (FAQ) posting for sci.space.tech and sci.space.science . It is crossposted into sci.space.policy to explain...

I'm playing with fantasy rockets for science fiction scenarios, and I'm looking for some typical figures for rockets. What would you say was a reasonable...

Afternoon all. The current foremost contender for the X-Prize is, of course, Scaled Composites - expected to formally announce soon, I believe - which uses a...

Check out this article: http://www.e4engineering.com/story.aspx?nid=tsj5d&id=217987 Apparently, some researchers have found a way to turn pure Zirconium into...

I'm up on the Space Station and I go out for a nice little space walk. I take along my specially designed hunting rifle and fire a bullet down at the planet. ...

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

Hi, In one of those moments of conceptual flux, I wondered if it would be feasible, using today's existing materials, to developp a zero-propellant orbital...

Dear all, I have a question to the community: Is there a relation between data rates and downlink frequency of a satellite? Thanks for the help in...

This is the weekly Frequently Asked Question (FAQ) posting for sci.space.tech and sci.space.science . It is crossposted into sci.space.policy to explain...

Is there a good place (book, Website, etc.) offering a balanced analysis of the different approaches to heavy lift and the pro and con concerning the need...

Hey guys, I've been lurking for a while due to trying to get my thesis done and other things, but I had a quick question for the board. I already sent email...

Hello everybody, I have two questions to ask: 1- Is it possible to have a satellite orbit parallel to the equatorial plane? Something like a GEO orbit but...

Titan is unique among all the planetary moons in having a dense atmosphere. This atmosphere has a number of unusual characteristics that it shares with Earth's...

I'm just an average person with an English degree, so I'm unfamiliar with the science and physics and space craft reentry, so this is likely a very stupid...

Some months ago I reconsidered an old idea of mine about a different way to go to space. I still believe it might work. But feel free to tell me why you reckon...

This is the weekly Frequently Asked Question (FAQ) posting for sci.space.tech and sci.space.science . It is crossposted into sci.space.policy to explain...

In reading Spacex's on line documents/updates I read that the RP-1 and LOX tanks share a common bulkhead. How do you keep the RP1 from turning to wax at LOX...