A decent, unclassified (gasp!), short paper on the...

Probably such things have been hashed out before, but allow me to solicit the opinion of the readership on this question that has come up in some off-line...

There's a cute illustration of the tendency for optical spysats to have orbits optimized for, among other things, sun angle and time of day at...

For use in a private scientific project I'm researching how long a small earth orbiting satellite will operate. The satellite's electronics needs to generate...

Hi Can anyone send me the real (or at least the range of it) charecteristics of the electerical motor of a real reaction wheel (such as electerical resistance...

Hi. I've already used google to find an answer,but the links weren't very helpful,that's why I'm asking he Are there any good books or papers about the...

Does anyone know what it is happening with the calibration of Spirit's cameras? Please, watch these photos: The first is of the rock called...

Not sure to what extent this sort of thing is news, but some might be interested: Dassault have built and produced an aircraft without building a single...

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...

In article , Joann Evans wrote: Second, even if it did, the crew would have to know or suspect that there was a...

Richard Schumacher wrote in message ... I was about to write "cruise missle", but hell: why...

Fifteen years ago Richard Moss proposed to levitate a superconductive cable in the Earth magnetic field. This idea does not make sense because no existing...

Title of the report: "Assessment of Options for Extending the Life of the Hubble Space Telescope: Final Report (2005)" URL:...

The interior of liquid rocket combustion chamber is usually cooled with the so called "curtain cooling," which is a spray of hydrocarbon fuel. The fuel...

The armchair buckytubes have very low electric resistance and very high maximum current density -- about one billion amperes per square centimeter. If...

The technology described in this post has not been tested, but it looks trivial when compared to rocket launchers, and it may reduce the cost of space access...

Oops... The Arcam EBM S12 fabrication speed is only about 17 cubic millimeters per second, but its scanning speed is 1 km/s. A much more powerful electron gun...

Good news: inert metal compounds such as platinum coated titanium rods are sometimes used as the anodes. They do not corrode in marine environment, so they...

This topic was mentioned in sci.space.policy (How to Cool a Planet), but sci.space.tech is a better forum for serious technical debate. The review of nearly...

The rocket launchers and their payloads have streamlined shape to reduce their aerodynamic drag. Large, low density payload, such as a large telescope or a...