Black Holes or Black Hole Stars? Astronomers Spar over 'Little Red Dots'
a day ago
- Astronomers using the James Webb Space Telescope discovered mysterious 'little red dots' that are extremely bright, red, and tiny.
- Initial interpretations suggested these dots were either distant galaxies or supermassive black holes at galaxy centers.
- In spring 2025, two teams observed unusual little red dots with a Balmer break, leading to the proposal of a new object: a black hole star (a hydrogen shell powered by a central black hole).
- Black hole stars could represent a new phase in supermassive black hole formation, acting as 'seeds' that later break free from their cocoons.
- A rival interpretation argues the dots are standard supermassive black holes viewed at certain angles, with gas and dust accounting for their redness.
- The debate remains unresolved, with both theories fitting current data; further observations are needed.
- A census in 2026 found that little red dots disappear as the universe ages, supporting the black hole star model as a transient phase.