Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

In the heart of our Milky Way galaxy, two gigantic "bubbles" extend roughly 50,000 light-years above and below the galactic ...

Visual observers and astrophotographers alike can find something amazing to observe along the plane of our galaxy.

Hypervelocity stars (HVSs) were first theorized to exist in the late 1980s. In 2005, the first discoveries were confirmed.

For the next 300 years, astronomers assumed that the Milky Way was the entire universe. As astronomers scanned the night sky with larger telescopes, they were intrigued by fuzzy patches of light ...

In the 1920s, astronomers thought that the Milky Way was the entire universe. Hubble's discovery revealed a much bigger ...

They published a paper in the May 2008 issue of Monthly Notices of the Royal Astronomical Society entitled “The Collision Between the Milky Way and Andromeda.” (Admittedly, be wary of the term ...

These glass plates recorded images of the night sky using a light-sensitive ... His measurements marked the end of the Great Debate about the Milky Way’s size and the nature of the nebulae.