Cassiopeia A
Cassiopeia A (Cas A) is the remnant of a supernova that occurred approximately 11,000 light-years away in the constellation Cassiopeia. The light from the supernova… Read More »Cassiopeia A
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Cave Nebula (Caldwell 9)
The Cave Nebula is an emission nebula located approximately 2,400 light-years away in the northern constellation Cepheus. With an apparent magnitude of 7.7 and an… Read More »Cave Nebula (Caldwell 9)
Constellations in the Sky Tonight
The constellations in tonight’s sky host many familiar star patterns. For northern observers, autumn is the best time of the year to see Cassiopeia’s W,… Read More »Constellations in the Sky Tonight
Bat Nebula (IC 1340)
The Bat Nebula is a region of ionized gas within the larger Veil Nebula, an ancient supernova remnant located in the constellation Cygnus (the Swan).… Read More »Bat Nebula (IC 1340)
Spare Tyre Nebula (IC 5148)
The Spare Tyre Nebula is a planetary nebula located 3,000 light-years away in the southern constellation Grus (the Crane). It has an apparent magnitude of… Read More »Spare Tyre Nebula (IC 5148)
Superman Galaxy (NGC 7479)
The Superman Galaxy is a barred spiral galaxy located approximately 105 million light-years away in the northern constellation Pegasus. With an apparent magnitude of 11.6… Read More »Superman Galaxy (NGC 7479)
Fish Head Nebula (IC 1795)
The Fish Head Nebula is an emission nebula located approximately 6,000 light-years away in the northern constellation Cassiopeia. The nebula is 3.1 arcminutes across and… Read More »Fish Head Nebula (IC 1795)