In the vast expanse of the universe, there are cosmic giants so enormous that they stretch our understanding of scale and ...

Earth and our entire Milky Way galaxy may sit inside a mysterious giant hole which makes the cosmos expand faster here than ...

Scientists believe the Milky Way contains up to 400 billion stars and at least as many planets. The largest galaxy known, IC 1101, has more than 100 trillion stars. Step outside on a clear night and ...

The biggest known planet in the Milky Way may be HD 100546 b, which is a very large gas giant in the process of forming with a diameter roughly 6.9 times that of Jupiter, or 77 times that of Earth.

The Milky Way contains between 100 billion and 400 billion stars, but the exact number is difficult to determine due to the galaxy's vast size and the presence of dust that obscures our view.

The Milky Way, however, is much larger than would be expected based on the size of our Local Sheet, despite not being an uncommonly large galaxy on a universal scale.

Astronomers have at last identified what’s believed to be the edge of the Milky Way galaxy. A team of astronomers from England used that farthest point to determine that the diameter of the ...

Using gravitational microlensing, scientists have discovered a rare, large planet at the edge of the Milky Way. The planet is ...

His measurements marked the end of the Great Debate about the Milky Way’s size and the nature of the nebulae. Hubble wrote about his discovery to Harlow Shapley, who had argued that the Milky ...

Astronomers suspect that the Milky Way reached its current size through a series of mergers like this one. (Image credit: NASA) A violent youth.

“Most of the Milky Way satellites have very ancient star populations. They stopped forming stars about 10 billion years ago,” said Marco Arias, the lead author of the study, in the same release.

“So things are dangerous for the Earths,” Dr. Bennett said. He also said that the abundance of free floaters in the Milky Way suggests that planet-size objects slamming into each other during ...