APOD: 2026 October 21 – New Ghosts Revealed in Cassiopeia

T1Covered by 1 source · first reported by NASA / ESA / JAXA at 21 Oct, 04:05 UTC

APOD 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 cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation…