Astronomers have confirmed the first known triple system in which all three galaxies host actively feeding, radio-bright ...

2025 was another big year for black holes, and here's our pick of the top black hole stories from the last twelve months.

Neutron stars explained through stellar remnants and collapsed stars, revealing extreme density, gravity, magnetism, and ...

What's the size of the Milky Way galaxy? Learn how, depending on your definition, the size can change.

Astronomers detected a collision between two black holes in unprecedented detail early in 2025, offering the clearest view yet into the nature of these cosmic oddities and confirming long-held ...