Space / Research Record
A sunrise that briefly reverses
On parts of Mercury, the Sun can rise, retreat and rise again.
Inside this record
The location-dependent claim, NASA’s explanation, and the limit that keeps a striking hook accurate.
- A precise, usable claim
- Concise explanation and context
- Linked supporting sources
- Material caveats and a research note
Source check: 2026-10-07. Source: NASA.
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