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Alvan Graham Clark discovers the white dwarf star Sirius B, a companion of Sirius, through an 18.5-inch (47 cm) telescope now located at Northwestern University.
Related Wikipedia articles
Alvan Graham Clark
19th-century American astronomer
Alvan Graham Clark was an American astronomer and telescope-maker.Source: Wikipedia (CC BY-SA)
White dwarf
Stellar core remnant
A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: in an Earth-sized volume, it packs a mass that is comparable to the Sun. No nuclear fusion takes place in a white dwarf; what light it radiates is from its…Source: Wikipedia (CC BY-SA)
Sirius
Brightest star in the night sky, in the constellation Canis Major
Sirius is the brightest star in the night sky. Its name is derived from the Greek word Σείριος (Latin script: Seirios; lit. 'glowing' or 'scorching'. The star is designated α Canis Majoris, Latinized to Alpha Canis Majoris, and abbreviated α CMa or Alpha CMa. With a visual…Source: Wikipedia (CC BY-SA)
Northwestern University
University in Evanston, Illinois, US
Northwestern University (NU) is a private research university in Evanston, Illinois, United States. Established in 1851 to serve the historic Northwest Territory, it is the oldest chartered university in Illinois.Source: Wikipedia (CC BY-SA)
January 31
Day of the year
January 31 is the 31st day of the year in the Gregorian calendar; 334 days remain until the end of the year.Source: Wikipedia (CC BY-SA)