Deep-Sky Objects, Galaxies The Andromeda Galaxy (M31), open cluster NGC 188, and planetary nebula NGC 246
Deep-Sky Objects, Stars The Dolphin’s Diamonds, the Helix Nebula (NGC 7293), and the Blue Flash Nebula (NGC 6905)
Astronomy for beginners, Deep-Sky Objects The constellation Vulpecula, globular cluster M30, and the Iris Nebula (NGC 7023)
Deep-Sky Objects, Exoplanets, Planets The Belt of Venus, the Magic Carpet Nebula (NGC 7027), and emission nebula IC 1396
Deep-Sky Objects, Exotic Objects, Stars How can scientists distinguish between planetary nebulae and supernova remnants?
