WebGuillochon's answer mentions that O-type stars often have surface temperatures of about 30,000 K. Many, - if not most - Wolf-Rayet stars exceed that by drastic amounts. Some of the hottest may be the Wolf-Rayet components of the binaries AB7 and AB8, in the Small Magellanic Cloud. Both have normal O-type companions, which are also exceedingly hot. WebPeter Bodenheimer, in Encyclopedia of Physical Science and Technology (Third Edition), 2003. V.B Evolution on the Main Sequence. During the burning of H in their cores, stars move very slowly away from the ZAMS. The main-sequence lifetimes, up to exhaustion of H at the center, are given in Table III.High-mass stars go through this phase in a few …

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WebThe Sun is classed as 'G' star, with a temperature of about 5,800 °K. (When talking about the temperature of stars, we usually use the unit 'Kelvin' - 5,800 °K is about 5,500 °C.) … Web15 jan. 2003 · ``B'' stars had the next strongest, and so on through the alphabet. In the twentieth century, when the physics of absorption lines was better understood, it was realized that spectral class represents a particular temperature range. The ``O'' stars are the hottest, and the ``M'' stars are the coolest. O = 40,000 Kelvin B = 20,000 Kelvin church games for kids online

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O-type stars are hot and luminous. They have characteristic surface temperatures ranging from 30,000 to 52,000 K, emit intense ultraviolet light, and so appear in the visible spectrum as bluish-white. Because of their high temperatures the luminosities of main sequence O-type stars range from 10,000 times the Sun to around 1,000,000 times, giants from 100,000 times the Sun to over 1,000,000, and supergiants from about 200,000 times the Sun to several million times. Web12 jul. 2015 · It is this that sets an upper limit of around 60,000-70,000 K to the surface temperature of the most massive stars, which are dominated by radiation pressure. In regions of higher density or higher gravity, radiation pressure is not such an issue and temperatures can be much higher. Web3 feb. 2009 · If a star looks red, that means its surface temperature is approximately 2,500 Kelvin. Just for comparison, our Sun, which actually looks white from space, measures about 6,000 Kelvin. The hotter... church games and activities