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...

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...

Tom wrote: So how big is the impellor going to be in this pump? It doesn't have one. I considered a volute casing Barske-type impellor pump, but it would...

I'd like to bounce a propulsion idea off the experts of this group: Visualize a very small, v-shaped notch in a thin layer of diamond - maybe 100nm wide and...

I was wondering if someone could confirm that the masses of the following fictional, upper stage spaceplane (VTHL) was realistic given current aerospace...

I was too busy this morning to post this note, however; Midday wednesday my mail system was knocked offline by a unusually large spike in virus emails...

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...

I recently came across an intriguing photo of what appears to be a four-engined Titan first stage. http://www.bernd-leitenberger.de/titan34.html (scroll down...

Not sure how on topic this is here, but I notice in Nature this week a discussion about the so called force that has meant these craft are not where they are...

sci.space.moderated has links to articles about Stanford's entry and (thanks to L Sternn) to the CMU Red...

Do spin-stabilized satellites have attitude drift requiring periodic correction? If not, why? Even inertial navigation platforms have drift. If yes, how do...

Hi, I ran some of the images from the Titan probe through a terrain generation program. The results are quite cool. The source images were a bit noisy and so I...

Space Station News /////////////////////////////////////////// NASA, SpaceX Invite Media to Next Commercial Crew Launch Posted: 05 Mar 2021 11:17 AM...

so who is working on their own rocket ship???? well? Due to a website crash. photos of mine are not available until i pull out the album and re-scan the...

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...

In _Entering Space_ Robert Zubrin mentions that it would take only a small amount of Delta V to send Kuiper Belt Objects down to Mars. He believes comets...

I have put together an article about Luna-3 based on Chertok's book, Russian papers I have found in my files and help from Don P Mitchell. The idea was to...

wrote in message ... The thought ran through my head that a nuclear thermal rocket is...

During the past few years I have asked several questions about planetary drillers in sci.space.* newsgroups and I've got some very good answers, links and...

I am a student at San Francisco state, journalism major, and am compiling a story about the upcoming space shuttle launch. i am on a deadline and truly would...