The DSP-23 satellite, from all the sources I've read, weighs about 2.5 tonnes. Why did it need a Delta-4 Heavy to launch it to GEO, when something like the...

If all you want to do is put 1 kg in low lunar orbit, it can be done with a rocket with mass no bigger than 391 kg! Here are my calculations (I used the...

Why Astronauts Don't Like Shrinks By HILARY HYLTON/AUSTIN http://www.time.com/time/health/article/0,8599,1587495,00.html?cnn=yes I like this quote the...

With falcon doing so well why bother spending money on a nasa dedicated capsule system?' they will still be documenting their plans when falcon has hauled...

Why are all the NASA studies so determined to build the new heavy lift vehicle around the Shuttle tank? Yes, it's nice to reuse components when possible (the...

It seems a bit odd. Leaving aside the NASA ISS business, SpaceX has over a dozen commercial GEO sats booked for the Falcon 9. ULS/Boeing/ LockMart have none...

Why are we about to spend years and untold billions developing CEV when a superior vehicle is closer to reality? Kliper can fulfill all of our requirements in...

Why colonize space? Because we are dealing in absolutes. We are dealing in returns, increasing returns (the frontiers and resources of the solar system and...

Why colonize space? Because we are dealing in absolutes. We are dealing in returns, increasing returns (the frontiers and resources of the solar system and...

WHY DO I GET THE FEELING THIS IS LITTEL ASS DICKHEAD ALAN ERSKINE From: "AlanErskineass" alanersk Subject: poeple post stuff about me when iam slepping that...

I've been reading usenet for years now, and these groups definitely have a much higher kook ratio. Any theories on why this is so? Byeeeee. -- Gadzooks -...

(I always used to hate when people did this for class debates...) Can someone tell me why we SHOULDN'T fund the ISS? (I'm on the pro-funding side, and i want...

http://www.spaceref.com/news/viewsr.html?pid=9926 talks all about electric ion engines but doesn't mention nerva type engines. Why?

From Spaceflight Now: http://www.spaceflightnow.com/sealaunch/thuraya3/08114preview.html Sea Launch counting down for its return to flight .... the stage...

http://www.spacex.com/Maiden_Flight_Overview.pdf They must have some good reason that makes it worthwhile to boil off as much LOX as they can before launch,...

Oh yeah, We're living in an Orwellian State.

I think we should do that to prevent an alien invasion !

Although geologists believe rocks go through recycling and minerals can assume the forms of their environment (pseudomorphic replacement), they don’t study the...

my gmail can not receive the appurtenance of more than 5M form the postbox of hotmil or yahoo or other.why?

Many people say they see no reason to go back to the moon and want to go on to Mars without a lunar program. However, it is probably easier to make a case for...