When observing galaxies very similar to the Milky Way, researchers have deduced that they are slowly expanding in size

When observing galaxies very similar to the Milky Way, researchers have deduced that they are slowly expanding in size
A new study has shown that alien worlds tend to have shorter orbital periods when swinging around their metal-rich stellar parents
By studying distant galaxies, astronomers could reveal the large amounts of atomic hydrogen and how it affects star formation