Part 4 of the Messier objects quiz: another 10 galaxies, nebulae and star clusters to recognise. A good test before a night of stargazing with a telescope.

Messier catalogue quiz, part 2: 10 new deep-sky photos to identify. Galaxies, nebulae, open and globular clusters. Ready for a harder round than part 1?

Part 3 of the Messier objects quiz brings fainter, trickier deep-sky targets. Pick the right Messier number for each photo and learn a fact after every answer.

This is a simple Messier Catalog object identification quiz. Can you name a galaxy, nebula, or star cluster from a picture? Test yourself on famous deep-sky objects like M1 (Crab Nebula) or M31 (Andromeda Galaxy).