In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

High radiation during a time of frenzied star formation in the Milky Way left one stellar population with few chances to form planets, a study reports.

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 ...

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

Rich describes the discovery of the universe beyond the Milky Way as being a revelation centuries ... with how faint it appeared to be in the night sky. Even today, Leavitt's period–luminosity ...

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 ...

New research from the SAGA Survey, comparing the Milky Way with 101 similar galaxies, unveils how our galaxy differs ...

It can be seen with the naked eye on a very clear autumn night as a faint cigar-shaped ... nebula' was actually very far outside our own Milky Way galaxy -- at a distance of approximately 2.5 ...

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.