Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty.
In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).
New!!: NGC 225 and Constellation ·
A light-year (abbreviation: ly), sometimes written light year, is a unit of length used informally to express astronomical distances.
New!!: NGC 225 and Light-year ·
A minute of arc (MOA), arcminute (arcmin) or minute arc is a unit of angular measurement equal to one-sixtieth of one degree.
New!!: NGC 225 and Minute and second of arc ·
The New General Catalogue of Nebulae and Clusters of Stars (abbreviated as NGC) is a well-known catalogue of deep-sky objects in astronomy compiled by John Louis Emil Dreyer in 1888, as a new version of John Herschel's Catalogue of Nebulae and Clusters of Stars.
New!!: NGC 225 and New General Catalogue ·
An open cluster, also known as galactic cluster, is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age.
New!!: NGC 225 and Open cluster ·
A parsec (symbol: pc) is a unit of length used to measure the astronomically large distances to objects outside the Solar System.
New!!: NGC 225 and Parsec ·