I am writing a program that simulates a planetary system (a star and a group of planets in orbit about it). I am writing the program in Tcl and I have ported a...

Would there be any advantage to using the Mars style airbag descent on the moon? Get down near the surface via rocket, slow the descent, fire airbags and then...

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...

Flywheel energy storage has been suggested for use on the Moon (see http://www.asi.org/adb/04/03/03/flywheel-energy-storage.html ). But I haven't seen a...

Most studies of O'Neill type colonies assume that we would get the millions of tons of material from the moon via a catapult. However, there are some Near...

I read that the Kassam rockets are fueled by a combination of sugar and fertilizer. Anyone know how good a fuel it is? ISP numbers? How does it compare to...

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I'm not sure if this should be in sci.space.science or here. Its a little about comets and asteroids structure and a little about technology. Anyway here it...

Would it be possible to design something like the XCOR Lynx for level flight, with a rocket but still have a useable range? Let's say a normal cruise speed,...

Korycansky et al wrote about moving Earth via 1 million engineered asteriod near-misses, to avoid climate change as the sun grows...

This website... http://www.astronautix.com/stages/satkhead.htm ...mentions a "flat bulkhead" for a possible Saturn IC revision that "consists of multiple...

Anyone know offhand why the recent Sea Launch performance was less than the previous ones? The most recent launch was: 4737 kg, 760 km perigee, 35768 apogee,...

Wouldn't it be nice if there were water on the moon? ()Sorry - broken record effect)

Did the have to do a retro burn to slow down into lunar orbit? I don't seem to remember any of the missions having done so. i.e. as you climb out of a...

Jan Philips on sci.space.history asked "How low can you orbit?". I have a space simulator that could be used to play around with this kind of problem. I had...

Given the types of extremely hazardous research now being performing into biological, and potentially nanotech technology. Would it not make sense to lobby the...

Has anyone read this article? In an exclusive story, Av Leak claims that Rutan has modified his spacecraft to improve its stability. Burt may still make Dec...

(Henry Spencer) : In article , John Carmack wrote: ...If...

Sorry if I am belabouring the obvious but rocketry is not my field (x-ray optics is) but was curious about solar thermal rockets so looked in my old physics...

Tony Rusi wrote: put the ISS in the inclination as the moon? Yes, (assuming you meant "same inclination") but there would be...