I'm looking for general ways of calculating estimates of stationkeeping deltavee requirements (e.g., m/(s y)) for satellites/stations in various orbits (low,...

is it possible that in the low pressure/dry mars environment that static electricity discharges due to dust friction is causing the failures ?

As a software/system engineer, I'm very curious about the software (and hardware) organization in the MER's control system. Is there any link to detailed...

I know this may sound naiive but can I somehow help in analysing the possible problems with the rover. I am a EE with a masters degree and was looking for a...

All over the news today is news that the Spirit rover has stopped communicating 'properly' with Earth. ...

i'm not entirely sure what supplies bound the Soyuz TMA lifetime, other than the container used for the toilet gets filled after 4 days use. Other than the...

latest news does not sound positive for spirit. no meaningfull communication in 24 hours and nothing at all on the scientific channels.

I could've sworn I saw Henry Spencer state recently (or I stumbled over it in a newsgroup search recently) that the Space Shuttle's external tank by itself had...

Getting massive objects moving seems to be one of the biggest challenges that we face with exploration of the solar system. With manned missions, the...

I looked on the web curious about thrust augmentation concepts for jet engines and found a 1952? NACA report that detailed an experiment where water was...

Reading lists and recommended references are a recurrent theme in sci.space.* This occurs so often that it seems like there is a FAQ missing here. This...

I just started a new news group for space tethers on Yahoo. You can access it over the web or get it as email. To join go...

Please give me any reference to an article or a book that contain Literature review of current Remote Sensing issues in the last few years

Are any back-up rovers available (US, UK, whatever) that might be tweaked slightly (ex; made teleoperable) and sent to the Moon to, say, explore possible lava...

Funny thing is that Werner Von Brown was the one who proposed this ion engine more than 50 years ago. What was it with these Germans -- Einstein and Von Brown....

You can run but you can't hide. They are everywhere. Giant slug marks. What could cause them? Dark contrail like features everywhere. Scientist...

I see there's a new stereo anaglyph at the MER web site. Wouldn't it be nice if they were able to publish the stereo images on a Viewmaster (tm) reel and...

Bar the development of some revolutionary technology, is it realistic to think that we can land on Mars and come back? Say we want to bring a piece of Martian...

What does the combustion chamber actually do? It's a place for the propellants to mix and burn subsonicly. The mixing typically requires ferocious...

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