Why can't we scoop energy from space into our crafts to provide propulsion. Space is full of energy!!! Why do we have to use power plants designed on...

Matt wrote: The lowest practical circular orbit of the Earth is perhaps 150 km - what are the equivalent figures for the airless Moon and the thinly clad...

If you take a look at the moon, it is possible to orbit closely, however, it isn't really practical to orbit the moon for very long anyways. The moon is pretty...

Amazingly enough, it's that time of year again on Mars. I've seen a number of hints as to how to get Spirit into position to survive the upcoming winter by...

Matt wrote: The lowest practical circular orbit of the Earth is perhaps 150 km - what are the equivalent figures for the airless Moon and the thinly clad...

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...

I havent got a clue about the physicle forces on such a wire, but it seems like it would only be 4 times the length of a space elevator.. is it posible?

A pair of scientists funded by ESA are claiming to have observed some sort of gravitational anomaly by rotating a superconductive...

the NASP ~ National Aerospace Plane ~ X-30 which Ronald Reagan called " a new Orient Express" was announced 20 years ago this week during the State Of The...

This is partly in answer to the Scientific American article about cosmic rays likely preventing human spaceflight. I have long believed that O'Neill colonies...

I have been looking for a rugged laptop that will work at 30,000ft without much luck. It seems that MIL-STD-810F only requires hardware to be tested at...

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...

InEurope wrote: Hi I have two question 1. The CMB (Cosmic Microwave Background Radiation) Scientist say that it isotropic through out our universe ,...

Sorry if this appears twice, I thought I had posted it but it still hasn't appeared yet... I am trying to flesh out the wiki article on nuclear thermal...

Hi all In case anyone missed...

How does the width of a frequency band relate to the actual digital communications bandwidth? For instance, the Ka band satellite downlink is from 18.3-18.8...

I'm trying to add a direct comparison of nuclear-thermal vs. chemical engines to the article on the wikipedia. I'm hampered by a lack of even simple data. It...

Since the success of SS1, there has been greater interest in rockets using N2O as an oxidizer. The pluses of N2O seem to be: 1) Availability - You can buy a...

All I could find on Google are countless links which give inclination of eclipses related to Earth equator, or inclination of Earth axis related to...

Presumably sci.space.tech is not exclusively about propulsion. Has there been much study about what kind of weaponry a manned spacecraft might carry with...