Search results
Results from the WOW.Com Content Network
All supergiants are larger and more luminous than main sequence stars of the same temperature. This means that hot supergiants lie on a relatively narrow band above bright main sequence stars. A B0 main sequence star has an absolute magnitude of about −5, meaning that all B0 supergiants are significantly brighter than absolute magnitude −5.
The Sun is found on the main sequence at luminosity 1 (absolute magnitude 4.8) and B−V color index 0.66 (temperature 5780 K, spectral type G2V). The Hertzsprung–Russell diagram (abbreviated as H–R diagram, HR diagram or HRD) is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities and ...
The Milky Way is an example of a spiral galaxy. It is estimated that there are between 200 billion [7] (2 × 10 11) to 2 trillion [8] galaxies in the observable universe. Most galaxies are 1,000 to 100,000 parsecs in diameter (approximately 3,000 to 300,000 light years) and are separated by distances in the order of millions of parsecs (or ...
Red supergiant. Hypergiants. absolute. magni-. tude. (MV) A blue supergiant(BSG) is a hot, luminous star, often referred to as an OB supergiant. They are usually considered to be those with luminosity classIand spectral classB9 or earlier,[1]although sometimes A-class supergiants are also deemed blue supergiants. [2][3][4]
List of the most massive known stars. Legend. Wolf–Rayet star. Luminous blue variable. O-type star. B-type star. The following two lists show a few of the known stars, including the stars in open cluster, OB association and H II region.
For example, Alpha Herculis is classified as a giant star with a radius of between 264 to 303 R ☉ while Epsilon Pegasi is a K2 supergiant of only 185 R ☉. Although red supergiants are much cooler than the Sun, they are so much larger that they are highly luminous, typically tens or hundreds of thousands L ☉ . [ 9 ]
Play Just Words free online! By Masque Publishing. Advertisement. all. board. card. casino. puzzle. If you love Scrabble, you'll love the wonderful word game fun of Just Words.
Blue giant. In astronomy, a blue giant is a hot star with a luminosity class of III (giant) or II (bright giant). In the standard Hertzsprung–Russell diagram, these stars lie above and to the right of the main sequence. The term applies to a variety of stars in different phases of development, all evolved stars that have moved from the main ...