Sentences with phrase «most galactic disks»

The rotation curve is flat in the outer parts of most galactic disks (dark matter!).

Not exact matches

Some are found in globular clusters, but most move in a huge cloud around the disk called the galactic halo, which has a luminous inner component defined by globular star clusters and other easily observable stars (with coronae of hot gas possibly expelled by supernovae and of high - velocity neutron stars) and an outer dark - matter component inferred from its gravitational impact on the Milky Way's spiral disk.

Because gravity depends upon mass, you might think that most of a galaxy's mass would lie in the galactic disk or near the center of the disk.