For over a century, astronomers have marveled at the beauty and complexity of spiral galaxies, which feature arms covered in ...

The Milky Way is one of the biggest in the observable universe: Even if you traveled at the speed of light, it would take 100,000 years to go from one end of our home galaxy to the other.

To solve the Milky Way mystery, de Ruiter devised a method ... The back-and-forth motion was due to another star’s gravity tugging on the red dwarf. The researchers were able to measure the ...

Young stars enveloped in a transformative cocoon of gas shine brightly in a new image from the Hubble Space Telescope.