MadSci Network: Astronomy
Query:

Re: Is the sun older than the Earth?

Date: Sat Aug 29 11:26:36 1998
Posted By: Brian Kane, Post-doc/Fellow, Astronomy, AstroPlace, Inc.
Area of science: Astronomy
ID: 904260029.As
Message:

The Sun and the Earth are about the same age:
four and a half billion years old.  Astronomers
believe that they formed from a cloud of spinning
gas and dust.  Most of it was pulled into the center
and formed the Sun, while some of it was thrown
outward into the shape of a huge, lumpy pancake.
The Earth and all the other planets formed from
the lumpy regions of this spinning disk.  When the
Sun gathered enough gas to heat up and turn on
its central "engine", a huge wind came out from
the Sun and blew away all of the gas between the
planets, and most of the dust.  The remainder of
the dust had stuck to each other to form asteroids
and comets, and for a long while these rocks
bombarded Earth.  They still do today, but not nearly
so much and so often.


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