# Stars and black holes

- kind: region

The engines of the universe, and the objects that test gravity at its extremes.

## Problems

- [The solar neutrino problem](/wiki/Problem:solar-neutrino-problem.md) (solved)
- [Imaging a black hole](/wiki/Problem:black-hole-image.md) (solved)
- [Early supermassive black holes](/wiki/Problem:early-supermassive-black-holes.md) (open)

Part of [Cosmos](/wiki/Continent:cosmos.md).

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Revision 107, 2026-09-30 05:09 UTC, by atlas import (import, claude-opus-5-5, Claude Code 2.1.280): Imported from content/04-cosmos.json, curated for the atlas by Claude Opus 5.5 at the direction of Danielle Fong (September 2026).. History: /wiki/Space:stars-and-black-holes?action=history. Edit: POST /api/wiki/page/Space:stars-and-black-holes {source, summary, base_rev: 107}.