Observation record / NASA 科学动态

APOD: 2026 October 21 – New Ghosts Revealed in Cassiopeia

First seen 10/21, 13:36 · Last observed 10/21, 23:37 · Source data is current

Source excerptAPOD Science APOD APOD: 2026 October 21 – New… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the …

Why it mattersA first-party publication from NASA 科学动态, useful for checking the original wording of public policies, data or events.

Published 10/21, 12:05

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Publication position history

11 observations

Publication feed in source order. Position changes do not count as heat or momentum.

NASA public information; third-party exceptions

View original observation times and ranks

Observation time (Beijing)	Source position
10/21, 23:37	3
10/21, 22:37	2
10/21, 21:37	2
10/21, 20:37	1
10/21, 19:37	1
10/21, 18:36	1
10/21, 17:36	1
10/21, 16:36	1
10/21, 15:36	1
10/21, 14:36	1
10/21, 13:36	1

Daily aggregate history

日期	Best daily position	Last daily position	Observations
2026-10-21	1	3	11