Year 2021, Month 08
- 01: Pluto in Enhanced Color
- 02: The Hubble Ultra Deep Field in Light and Sound
- 03: A Perseid Fireball and the Milky Way
- 04: EHT Resolves Central Jet from Black Hole in Cen A
- 05: Tycho and Clavius
- 06: Stars and Dust Across Corona Australis
- 07: Jezero Crater: Raised Ridges in 3D
- 08: A Perseid Below
- 09: Perseus and the Lost Meteors
- 10: Fire in Space
- 11: Mammatus Clouds over Saskatchewan
- 12: A Beautiful Trifid
- 13: A Perfect Spiral
- 14: Island Universe, Cosmic Sand
- 15: Perseid Rain
- 16: Perseid Meteor, Red Sprites, and Nova RS Ophiuchus
- 17: M57: The Ring Nebula from Hubble
- 18: Rings Around the Ring Nebula
- 19: Bright Meteor, Starry Sky
- 20: Three Perseid Nights
- 21: Triple Transit and Mutual Events
- 22: Explosions from White Dwarf Star RS Oph
- 23: Abell 3827: Cannibal Cluster Gravitational Lens
- 24: PDS 70: Disk, Planets, and Moons
- 25: Solar System Ball Drop
- 26: A Blue Hour Full Moon
- 27: Elephant's Trunk and Caravan
- 28: Mars Rock Rochette
- 29: Orbits of Potentially Hazardous Asteroids
- 30: A Fire Rainbow over West Virginia
- 31: A Blue Moon in Exaggerated Colors