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From: REM@MIT-MC@sri-unix.UUCP
Newsgroups: net.space
Subject: Extrasolar planets
Message-ID: <4631@sri-arpa.UUCP>
Date: Sun, 28-Aug-83 18:43:00 EDT
Article-I.D.: sri-arpa.4631
Posted: Sun Aug 28 18:43:00 1983
Date-Received: Tue, 30-Aug-83 14:27:38 EDT
Lines: 10

From:  Robert Elton Maas <REM @ MIT-MC>

This is an astrophysics question: Small stars can't ignite hydrogen
fusion at all. Large stars ignite it and burn until it's virtually
exhausted, starting in the center and working outward until the helium
core is the whole star and the hydrogen outer part is infinitesimal.
Question, are there just-barely-stars which ignite hydrogen fusion in
their centers but can't maintain it and go out before the
burning-shell has reached the surface, leaving a helium core and a
hydrogen outer part permanently?