Article View: alt.sci.planetary
Article #39Re: Mars Observer Update - 10/09/92
From: Gabriel H Nahigian
Date: Mon, 12 Oct 1992 16:25
Date: Mon, 12 Oct 1992 16:25
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In article <1992Oct12.105531.11992@aio.jsc.nasa.gov>, tes@nomad.uucp (Thomas E. Smith [LORAL]) writes:
|> >Forwarded from:
|> >PUBLIC INFORMATION OFFICE
|> >JET PROPULSION LABORATORY
|>
|>
|> > Today Mars Observer is about 4.5 million kilometers (2.6
|> >million miles) from Earth, traveling at a speed of about 10,800
|> >kilometers (7,600 miles per hour) with respect to Earth. The
|> >spacecraft is traveling at a heliocentric velocity of about
|> >119,000 kilometers per hour (74,000 miles per hour).
|>
|>
|> Only 7,600 mph relative to Earth? Is that right? That's not even escape
|> velocity (~25,000 mph). I also can't think of a way for the craft to be
|> going 7,600 mph relative to Earth, and 74,000 mph relative to the Sun.
|> Can someone clear this up for me?
|>
|> Tom
Remember that the Earth is also moving pretty damn fast in relation to the
sun!!
Gabe (nahigian@athena.mit.edu)_
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Newsgroups: alt.sci.planetary Path: arc1-ca.pugleaf.net!sparky!uunet!snorkelwacker.mit.edu!bloom-picayune.mit.edu!athena.mit.edu!nahigian From: nahigian@athena.mit.edu (Gabriel H Nahigian) Subject: Re: Mars Observer Update - 10/09/92 Message-ID: <1992Oct12.162502.10918@athena.mit.edu> Sender: news@athena.mit.edu (News system) Nntp-Posting-Host: w20-575-41.mit.edu Organization: Massachusetts Institute of Technology References: <1992Oct12.105531.11992@aio.jsc.nasa.gov> Date: Mon, 12 Oct 1992 16:25:02 GMT Lines: 24