Astronomers bid an emotional farewell to Gaia, expressing their gratitude for its more than decade-long mission that gave us ...

After more than a decade of mapping the stars, the European spacecraft was shut down on Thursday. But its legacy lives on.

The Milky Way’s distinctiveness lies in its satellite ... Dark matter haloes are thought to play a crucial role in shaping galaxies by drawing in normal, baryonic matter to form stars and ...

A cosmic anomaly detected in a distant galaxy could portend a terrifying future for life in the Milky Way. The discovery suggests that our models of galactic evolution could be inaccurate.