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- Path: sparky!uunet!olivea!sgigate!sgi!cdp!ludwigsburg
- From: ludwigsburg@igc.apc.org (Ludwigsburg Middle School)
- Newsgroups: sci.astro
- Subject: Accretion Question
- Message-ID: <1465500005@igc.apc.org>
- Date: 22 Jan 93 14:29:00 GMT
- Sender: Notesfile to Usenet Gateway <notes@igc.apc.org>
- Lines: 23
- Nf-ID: #N:cdp:1465500005:000:998
- Nf-From: cdp.UUCP!ludwigsburg Jan 22 06:29:00 1993
-
-
- >re: spin rate of planets - the traditional approach based on
- angular
- >momentum of the particles the planets accreted from doesn't work
- because
- >it assumes accretion of small particles onto one planetary
- nucleus per
- >planet. In fact, a better understanding of accretion now leads
- to the
- >concept that an inner planet accreted from a range of objects up
- to 10
- >per cent of the planet's final mass - i.e. Earth was not built
- out of a
- >zillion bits of dust but out of 2 objects the size of Mars, 15
- the size of
- >the Moon, 40 the size of Ceres and so on.
- >Phil Stooke I may be in over my head with this since astronomy is
- my avocation and 8th grade earth science in my vocation, however
- if this explanation of planet formation is accurate how did the 2
- objects the size of Mars, 15 the size of the Moon, or 40 the size
- of Ceres form? I enjoy immensely reading this conference and I am
- learning continually from the discussions. Thanks folks! Larry
- Bahn Patch American High School, Stuttgart, Germany
-