Astronomy Picture of the Day

Galaxy Wars: M81 versus M82

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#106250 by @ 26.03.2008 00:00 - nach oben -
Galaxy Wars: M81 versus M82

On the left, surrounded by blue spiral arms, is spiral galaxy

On the right marked by red gas and dust clouds, is irregular galaxy

This stunning vista shows these two mammoth galaxies locked in
gravitational combat, as they have been for the past billion years.

The gravity from each galaxy
dramatically affects the
other during each hundred million-year pass.

Last go-round, M82's gravity likely raised
density waves rippling around
M81, resulting in the richness of
spiral arms.

But M81 left
M82 with
violent star forming regions and
colliding gas clouds so energetic the galaxy
in X-rays

In a few billion years only one galaxy
will remain.

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