Re: Ares
- From: "Steven L." <sdlitvin@xxxxxxxxxxxxxxxxxxx>
- Date: Tue, 01 May 2007 18:00:31 GMT
Brian Thorn wrote:
On 27 Apr 2007 08:21:54 -0700, john2375@xxxxxxxxxxx wrote:
I know it's a long way off, but what is the plan for re-entry of the
Orion crew capsule or whatever it's called - are they going to aim for
the lakebed at Edwards or what?
Edwards or Utah, I don't think a final decision has been made.
Also, concering a trip to Mars, which might happen in the early
2020s..
Try early 2030s at best. NASA is looking for the next human landing on
the _moon_ around 2020. Mars will be a decade after that, at least.
how long would the mission be?
Due to Earth/Mars alignments, there are two major mission profiles in
contention. One gives the crew about 30 days on Mars. The other about
2 years. The 30-day stay is generally considered too short for
worthwhile surface activity (considering the huge expense of getting
there) but the 2-year stay is thought to be much higher risk of
equipment failures, etc. It will be a long time before a decision is
made.
Have any life forms (even animals, let alone humans) ever been in space for several years?
A Mars mission can easily last a year or more round-trip. That's an awfully long time for humans to be exposed to cosmic rays, solar flares, the debilitating effects of microgravity, and (unique to humans) the loneliness of being so far from home in the event of a major malfunction.
Solar flares, which aren't as critical in LEO, could be disastrous just beyond the Earth-Moon orbit.
--
Steven D. Litvintchouk
Email: sdlitvin@xxxxxxxxxxxxxxxxxxx
Remove the NOSPAM before replying to me.
.
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