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Galaxies, averaging an estimated 100 million stars, [3] range in size from dwarfs with less than a thousand stars, [4] to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's centre of mass. Most of the mass in a typical galaxy is in the form of dark matter, with only a few per cent of that mass ...
Notes Proxima Centauri ... Luyten's Star: 12.348 ... Also the sixth-nearest stellar system to the Solar System and the brightest star in the night sky. Altair: 16.7 ...
Brammer's memoir ¡Hola Papi! How to Come Out in a Walmart Parking Lot and Other Life Lessons was published by Simon & Schuster on June 1, 2021. [ 10 ] It is a series of fourteen essays, framed as advice columns on topics like dealing with childhood trauma or life in the closet [ 1 ] and drawing on his early life as a young gay person in a ...
This illustrates the fact that there are far more faint stars than bright stars: in the entire sky, there are about 500 stars brighter than apparent magnitude 4 but 15.5 million stars brighter than apparent magnitude 14. [108] The apex of the Sun's way, or the solar apex, is the direction that the Sun travels through space in the Milky Way.
• Notes = Common name(s) or alternate name(s); comments; notable properties [for example: multiple star status, range of variability if it is a variable star, exoplanets, etc.] See also [ edit ]
UGC 11597, PGC 65001, Arp 29, [1] Caldwell 12 NGC 6946 , sometimes referred to as the Fireworks Galaxy , is a face-on intermediate spiral galaxy with a small bright nucleus, whose location in the sky straddles the boundary between the northern constellations of Cepheus and Cygnus .
The book was thoroughly illustrated along with observations and descriptions of the stars, their positions (copied from Ptolemy's Almagest with the longitudes increased by 12° 42' to account for the precession), their magnitudes (brightness) and their color. Notably, al-Sufi improved upon Ptolemy's system for measuring star brightness.
• Notes = Common name(s) or alternate name(s); comments; notable properties [for example: multiple star status, range of variability if it is a variable star, exoplanets, etc.] See also [ edit ]