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Besides computer simulations, what evidence do astronomers have to support the popular hypothesis that elliptical galaxies form from merging spirals? | Astronomy.com
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FROM THE July 2013 ISSUE

Besides computer simulations, what evidence do astronomers have to support the popular hypothesis that elliptical galaxies form from merging spirals?

J. R. G. Davies, Toronto
Published: Tuesday, May 28, 2013
RELATED TOPICS: GALAXIES
Mice and Antennae Galaxies
Different types of galaxy mergers and interactions exist. When a small galaxy merges with a much more massive one, astronomers call the process a “minor merger” and the more massive galaxy is little affected. We call mergers between galaxies with comparable sizes “major mergers,” and they can cause more significant changes in the galaxies’ properties.

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