The Conversation

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Thu May 14

Astrophysicists use ‘space archaeology’ to trace the history of a spiral galaxy

Written by Lisa Kewley, Director of the Center for Astrophysics | Harvard & Smithsonian, Smithsonian Institution

This artist's impression shows the spiral galaxy NGC 1365 colliding and merging with a smaller galaxy. Melissa Weiss/CfA

Billions of years ago, a young spiral galaxy began to grow in a crowded part of the universe. It pulled in gas and small companion galaxies, slowly building up the bright central region and sweeping spiral arms we see today.

In a...

Astrophysicists use ‘space archaeology’ to trace the history of a spiral galaxy

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