Are there any rocket fuels -- existing or potential -- that are less polluting than kerosene or hydrogen? If so, are any of them economically feasible?

I just finished reading This New Ocean that covers the space age. I really wasn't looking forward to the Skylab part but after I read it and then googled up...

Currently as a bit of a space fantic I have spent a great deal of time reseaching space colony technoloies and ideas. As well the technologies to get us there....

Assuming a lunar settlement uses solar power for all their energy needs, the biggest problem is how to store power during the 328 hour lunar night. If the...

What are the internal fax contact numbers for the NASA Pluto and Voyager Missions? -- NASA TV Fax # would be a plus too... I need to pass on a technical...

I'm a layman discovering the intricacies of space flight. I understand that the equations for DeltaV denote it as a sole function of mass ratio and engine...

----------------------------------------------------------------------------- 1st NASA/ESA Conference on Adaptive Hardware and Systems (AHS-2006) June 16-...

Hi I had a Scholarship to get Phd in remote sensing techniques , and I have diploma in electronic engineering . I am not sure about the research plan , I...

G'day, Would a OTEC system work in the internal ocean of an ice world like Europa or Enceladus? As I understand it OTEC systems on Earth work because of...

No, this post is not a joke, although I wish it were. My son attends an "art" high school in Lucca, Italy. His philosophy teacher and one of his art teachers...

Henry Spencer wrote: In article , Pete Lynn wrote: ...I would expect them to...

Hi, I wanted to mention this article I read, about a newly discovered way to reduce air resistance: http://www.physorg.com/news11095.html No flames, plz -- I...

I've read that there are stages of rockets that have actually flown that had a high enough ISP and mass ratio they could have gone to orbit if they did not...

Here's a nice not-too-technical writeup on the business aspects of the space elevator. Link found as a footnote to Howard Tayler's Shlock Mercenary daily web...

How difficult is it to tailor a parking orbit for lunar missions that can be reached efficiently by US launchers and precesses 180 degrees in one lunar...

I just finished reading This New Ocean that covers the space age. I really wasn't looking forward to the Skylab part but after I read it and then googled up...

A couple of questions on this space technology: 1)I was under the impression that carbon nanotubes, if manufacturable at reasonable lengths (~ a foot?) would...

I stumbled across a 1998 paper in which the writer said thin-film photovoltaics and improved designs could lead to a 10-fold decrease in mass for SPSs. I seem...

http://www.cnn.com/2006/TECH/space/03/10/mars.orbiter/index.html ....A little late on the announcement, but I had ISP troubles here. Rest assured they won't...

Two-Stage-to-Orbit 'Blackstar' System Shelved at Groom Lake http://www.aviationnow.com/avnow/news/channel_awst_story.jsp?id=news/030606p1.xml Hmm, I've never...