18 relations: Astronomy (magazine), Astronomy Picture of the Day, Blueshift, Caldwell catalogue, Cambridge University Press, Cassiopeia (constellation), Circumpolar star, Light-year, NGC 869, NGC 884, Open cluster, Perseids, Perseus (constellation), Pleiades, Radiant (meteor shower), Stellar classification, William Herschel, Zeus.
Astronomy is a monthly American magazine about astronomy.
Astronomy Picture of the Day (APOD) is a website provided by NASA and Michigan Technological University (MTU).
A blueshift is any decrease in wavelength, with a corresponding increase in frequency, of an electromagnetic wave; the opposite effect is referred to as redshift.
The Caldwell Catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.
Cambridge University Press (CUP) is the publishing business of the University of Cambridge.
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty.
A circumpolar star is a star, as viewed from a given latitude on Earth, that never sets below the horizon due to its apparent proximity to one of the celestial poles.
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
NGC 869 is an open cluster located 7600 light years away in the constellation of Perseus.
NGC 884 is an open cluster located 7600 light years away in the constellation of Perseus.
An open 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.
The Perseids are prolific meteor showers associated with the comet Swift–Tuttle.
Perseus is a constellation in the northern sky, being named after the Greek mythological hero Perseus.
The Pleiades (also known as the Seven Sisters and Messier 45), are an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus.
The radiant or apparent radiant of a meteor shower is the point in the sky from which (to a planetary observer) meteors appear to originate.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
Frederick William Herschel, (Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer, composer and brother of fellow astronomer Caroline Herschel, with whom he worked.
Zeus (Ζεύς, Zeús) is the sky and thunder god in ancient Greek religion, who rules as king of the gods of Mount Olympus.