# Imaging a black hole

- kind: problem
- status: solved (evidence tier V3)
- year: 1973

**Statement.** Can the shadow of a black hole's event horizon be seen?

A planet-sized array of radio telescopes, synchronized by atomic clocks, resolved the ring of light around M87's black hole. The shadow's size matched general relativity's prediction.

*Evidence tier V3 is the import default for a result the curation records as settled in the published record. No formal proof or certificate is attached to this page yet.*

Closed 2019, Event Horizon Telescope (M87*); 2022, Sagittarius A*.

## Sources

- [Wikipedia: Event Horizon Telescope](https://en.wikipedia.org/wiki/Event_Horizon_Telescope)

[Stars and black holes](/wiki/Space:stars-and-black-holes.md) · [Cosmos](/wiki/Continent:cosmos.md)

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Revision 109, 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/Problem:black-hole-image?action=history. Edit: POST /api/wiki/page/Problem:black-hole-image {source, summary, base_rev: 109}.