The Great Square of Pegasus is an asterism formed by three bright stars in Pegasus constellation – Markab, Scheat and Algenib – and Alpheratz in Andromeda.| www.constellation-guide.com
Learn about the 88 modern constellations, their names, history, how to identify them, why we see different constellations at different times of year, and other fun facts.| www.constellation-guide.com
Cetus is a large constellation in the northern sky. It represents the sea monster from the myth of Andromeda. It is home to the variable star Mira, the nearby star Tau Ceti, and the barred spiral galaxy Messier 77.| www.constellation-guide.com
Pegasus is a large constellation in the northern sky. Recognizable for the Great Square of Pegasus, the constellation represents the winged horse in Greek mythology.| www.constellation-guide.com
Cassiopeia is a prominent constellation in the northern sky. Recognizable for its W shape, the constellation is home to the Heart Nebula, the Soul Nebula, the Pacman Nebula, and the open clusters Messier 52 and Messier 103.| www.constellation-guide.com
Sirius, Alpha Canis Majoris (α CMa), is the brightest star in the sky. The Sirius star system lies at a distance of 8.6 ly from Earth in the constellation Canis Major. It can be found using the stars of Orion's Belt.| Star Facts
The W-shaped asterism formed by the five brightest stars of Cassiopeia is one of the most familiar features of the northern night sky. It is used to find the Heart and Soul Nebulae, the Double Cluster, the open clusters M52 and M103, and many other deep sky objects.| www.constellation-guide.com
Andromeda is a large constellation in the northern sky. Associated with the mythical princess Andromeda, the constellation is home to the Andromeda Galaxy (M31), the Blue Snowball Nebula, and the NGC 68 Group of galaxies.| www.constellation-guide.com
Taurus is a large constellation in the northern sky. It is home to Aldebaran, one of the brightest stars in the sky, the Crab Nebula, a supernova remnant, and the Pleiades and the Hyades, the nearest open clusters to Earth.| www.constellation-guide.com
Messier 45 (M45), also known as the Pleiades or Seven Sisters, is a bright open star cluster located in the constellation Taurus, the Bull. The Pleiades cluster has an apparent magnitude of 1.6 and lies at an average distance of 444 light years from Earth. The cluster is also known as Melotte 22. It does… Read More »Messier 45: Pleiades| Messier Objects
Vulpecula is a faint constellation in the northern sky. It represents the little fox. The constellation is home to the red giant Anser, the Dumbbell Nebula (M27), and as asterism known as the Coathanger.| www.constellation-guide.com
The list of all the named stars (stars with names that have been formally approved by the IAU), with name origins and etymologies explained.| Star Facts
The list of the 300 brightest stars in the night sky, along with the stars' Bayer designations, apparent magnitudes, distances, and spectral types.| Star Facts
Messier 27 (M27), also known as the Dumbbell Nebula, Diabolo Nebula or Apple Core Nebula, is a planetary nebula in Vulpecula. The Dumbbell Nebula is large in size and quite bright, which makes it a popular object among amateur astronomers. It can be seen in binoculars and small telescopes. The nebula covers an area of… Read More »Messier 27: Dumbbell Nebula| Messier Objects
Algenib, Gamma Pegasi (γ Peg), is a blue-white subgiant star located at a distance of 390 ly from Earth in the constellation Pegasus. It is one of the stars of the Great Square of Pegasus.| Star Facts
Charles Messier’s Catalogue of Nebulae and Star Clusters (Catalogue des Nébuleuses et des Amas d’Étoiles) is an astronomical catalogue of 110 bright deep sky objects that may be mistaken for comets. Even though it was compiled for the purpose of helping observers distinguish between permanent and transient objects in the night sky, the Messier catalogue… Read More »Messier Catalogue| Messier Objects