A team of astronomers have used the ALMA telescope to find a slowly-rotating galaxy in the early Universe. That galaxy is the youngest ever found with a measured rotation, and it's much slower than present-day galaxies.
All galaxies rotate, usually at incredible speeds. For example, the Milky Way galaxy has a rotation speed of over 200 kilometers per second. But astronomers do not yet understand how galaxies build up to these speeds. The only way to tell is through measurements of galaxies throughout cosmic time, building up aRecently a team of astronomers based at Waseda University in Tokyo used ALMA in Chile to observe an extremely distant galaxy.
They then developed a model of the size and rotation speed of the disk of the galaxy to compare against observations.
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