Do Spiral Galaxies Form from the Inside Out?

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Do Spiral Galaxies Form from the Inside Out?

Postby triton » Thu Apr 14, 2011 7:46 pm

Do Spiral Galaxies Form from the Inside Out?

by Ken Croswell

By exploiting a lucky accident, astronomers have for the first time measured a key property of a spiral galaxy located more than 9 billion light-years away. The observations show that oxygen and iron abound at the centre of the galaxy but not at its edge, which suggests spiral galaxies - including Andromeda and our own Milky Way - formed their giant discs of stars from the inside out.

Story at [url=http://physicsworld.com/cws/article/news/45677]http://physicsworld.com/cws/article/news/45677[/url]
triton
 
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