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- Newsgroups: talk.origins
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!ames!agate!linus!linus.mitre.org!mwunix!m23364
- From: m23364@mwunix (James Meritt)
- Subject: Re: Cosmos without Gravitation
- Message-ID: <1992Dec29.181008.7571@linus.mitre.org>
- Sender: news@linus.mitre.org (News Service)
- Nntp-Posting-Host: mwunix.mitre.org
- Organization: MITRE Corporation, McLean VA
- References: <1992Dec29.143703.7029@hsr.no> <1992Dec29.164826.5044@linus.mitre.org> <1hq1ueINNhev@hpscit.sc.hp.com>
- Date: Tue, 29 Dec 1992 18:10:08 GMT
- Lines: 36
-
- In article <1hq1ueINNhev@hpscit.sc.hp.com> dave@ptp.hp.com (Dave Waller) writes:
- }In article <1992Dec29.164826.5044@linus.mitre.org> m23364@mwunix (James Meritt) writes:
- }>In article <1992Dec29.143703.7029@hsr.no> onar@hsr.no (Onar Aam) writes:
- }>}>13. If planets and satellites were once molten masses...they would not have been
- }>}>able to
- }>}>obtain spherical form, especially those which do not rotate, as Mercury or the
- }>}>moon (with
- }>}^^^^^
- }>}>respect to its primary)
- }>}
- }>}
- }>}That is simply not true. The moon is rotating (ever heard of earth rise?)
- }>}although only slightly.
- }>
- }>wobbles, not rotate. If it rotated, 100% would (eventually) become visable.
- }>It doesn't.
- }
- }I believe you are incorrect on this one, Jim. The moon MUST be rotating,
- }and indeed, it's period is about 28 days. Otherwise, how could it orbit
- }the earth once every 28 days and keep the same face oriented at the
- }earth's surface? Think about it.
-
- Please note line 8, "respect to its primary". Naturally, it does wrt sol.
-
- }As for the "earthrise", well, that is simply wrong. What this person
- }must be referring to are some of the pictures that have been taken close
- }to the earth-relative horizon on the moon, which gives us a neat image
- }of the earth "rising" over the horizon.
-
- Well, there is an "earthrise" from the viewpoint of the craft that took the
- picture. It was the apollo command capsule in orbit of the moon, and the
- pictures were taken as it came out from "behind" the moon. Of course,
- the earth is stationary as seen from the surface - useful, since they
- aimed a number of antennae at terra when they landed and they stayed
- pointed at the (motionless) earth.
-
-