Deep-sky objects are everything beyond our solar system that is not a single star: star clusters, nebulae and galaxies. They are faint, so darkness matters more than magnification. A moonless night away from town makes the biggest difference.
Binoculars are enough for many of them, and a small telescope opens up the rest.
- Pleiades (M45)
- an open cluster in Taurus, visible to the naked eye in autumn and winter.
- Andromeda Galaxy (M31)
- the nearest large galaxy, about 2.5 million light-years away; a faint smudge to the naked eye under a dark sky.
- Orion Nebula (M42)
- a glowing cloud of gas in Orion's sword, easy in binoculars in winter.
- Hercules Cluster (M13)
- a ball of several hundred thousand stars, best on summer evenings.