Year 2021, Month 11
- 01: A Waterfall and the Milky Way
- 02: SN Requiem: A Supernova Seen Three Times So Far
- 03: The Horsehead and Flame Nebulas
- 04: NGC 147 and NGC 185
- 05: The Dark Seahorse in Cepheus
- 06: The Galaxy Between Two Friends
- 07: The Cat's Eye Nebula in Optical and X-ray
- 08: A Filament Leaps from the Sun
- 09: All of These Space Images are Fake Except One
- 10: Video of a Green Flash
- 11: NGC 1333: Stellar Nursery in Perseus
- 12: M33: The Triangulum Galaxy
- 13: Rosetta's Comet in Gemini
- 14: How to Identify that Light in the Sky
- 15: Light Pillar over Volcanic Etna
- 16: Geminids from Gemini
- 17: NGC 3314: When Galaxies Overlap
- 18: Full Moonlight
- 19: NGC 281: Starless with Stars
- 20: An Almost Total Lunar Eclipse
- 21: Introducing Comet Leonard
- 22: Lunar Eclipse over a Skyscraper
- 23: The Sun in X-rays from NuSTAR
- 24: Pleiades: The Seven Sisters Star Cluster
- 25: At the Shadow's Edge
- 26: Great Refractor and Lunar Eclipse
- 27: Messier 101
- 28: A High Cliff on Comet Churyumov-Gerasimenko
- 29: The Extraordinary Spiral in LL Pegasi