Deep-Sky Objects

Also known as the Great Globular Cluster in Hercules, M13 is without doubt the finest globular cluster visible from the northern hemisphere. All told, It contains around 300,000 stars, and spans a distance of 20 …

M90 (NGC 4569) is an intermediate spiral galaxy that contains around a trillion stars, and hosts roughly 1,000 globular clusters, making it one of the biggest members of the 2,000-strong group of galaxies called the …

M80 is a massive globular cluster located about 32,600 light-years away in the constellation Scorpius. As globular clusters go, it has been described as being the northern hemisphere’s equivalent of Omega Centauri (NGC 5139), the …

Messier 4 (NGC 6121) is a massive globular cluster in Scorpius that is found in the night sky close to M80, another globular cluster in the same constellation. M4 was discovered by Philippe Loys de …

Also commonly known as Praesepe (Latin: manger), M44 is a large open cluster in the constellation Cancer, and among the closest star clusters to Earth. As far back as the 2nd century AD, Ptolemy referred …

Most people mistake the Orion Nebula for a star in the constellation of Orion, but it is actually the most easily detectable naked-eye nebula in the entire night sky. This magnificent star-forming region is also …

Andromeda is also called Messier 31, or M31 for short, after French astronomer Charles Messier, who cataloged it in the 18th century. M31 is considerably larger than our own galaxy, with its stellar disk extending …