Astronomy Picture of the Day 20 December 2023 Ice Halos over Bavaria Image Credit & Copyright: Bastian Werner What's causing those unusual sky arcs? Ice crystals. While crossing
Astronomy Picture of the Day 19 December 2023 NGC 1499: The California Nebula Image Credit & Copyright: Steven Powell Could Queen Calafia's mythical island exist in space? Perhaps
Astronomy Picture of the Day 18 December 2023 The Same Color Illusion Image creditor details unavailable via API. Visit linked page below for full info. Are squares A and B
Astronomy Picture of the Day 17 December 2023 Geminids over China's Nianhu Lake Image Credit & Copyright: Hongyang Luo Where are all of these meteors coming from? In
Astronomy Picture of the Day 16 December 2023 Crescent Enceladus Image creditor details unavailable via API. Visit linked page below for full info. Peering from the shadows, the Saturn-facing
Astronomy Picture of the Day 15 December 2023 Betelgeuse Eclipsed Image Credit & Copyright: Sebastian Voltmer Asteroid 319 Leona cast a shadow across planet Earth on December 12, as it
Astronomy Picture of the Day 14 December 2023 Supernova Remnant Cassiopeia A Image creditor details unavailable via API. Visit linked page below for full info. Massive stars in our Milky
Astronomy Picture of the Day 13 December 2023 Deep Field: The Heart Nebula Image Credit & Copyright: William Ostling, Telescope Live What excites the Heart Nebula? First, the large emission