Star Clusters

Deep-Sky Objects

Beta Monocerotis, open cluster NGC 2281, and the Horsehead Nebula

Deep-Sky Objects, Galaxies

Open cluster NGC 956, spiral galaxy Fornax A, and elliptical galaxy NGC 1201

Deep-Sky Objects, Stars

Web Extra: Astronomers animate one of the largest galaxy clusters ever observed

Deep-Sky Objects

Two perspectives

Deep-Sky Objects, Galaxies, Stars

Three double stars in Orion, open cluster NGC 1528, and spiral galaxy NGC 1532

Deep-Sky Objects, Galaxies

Open cluster NGC 1545, emission nebula IC 2087, and spiral galaxy NGC 1566

Deep-Sky Objects, Galaxies

Two Perseus open clusters, emission nebula NGC 1491, and barred spiral galaxy NGC 1512

Deep-Sky Objects, Galaxies

Open cluster NGC 744, the Fiddlehead Galaxy, and elliptical galaxy NGC 1201

Deep-Sky Objects, Stars

A colorful gathering of middle-aged stars

Deep-Sky Objects, Stars

Web Extra: 11 top winter binocular gems

Deep-Sky Objects

Twin treats

Deep-Sky Objects, Stars

Hubble observations cast further doubt on how globular clusters formed