2007-05-06 08:13:44 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Some of what astronomers describe as "stellar evolution" does take place. However, the process is misnamed, and parts of it are questionable.
According to this theory, the life of a star is said to begin with the collapse of a gas cloud--a doubtful beginning, . Bypassing this fundamental origin problem, a young star is said to begin in the "main-sequence" category. These are average stars with a stable light output. The great majority of stars are in the main sequence, including our sun. Then when a star's hydrogen fuel runs low, it becomes a red giant or super-giant star. The star expands hundreds of times in size and becomes somewhat cooler. Red giants include Betelgeuse and Aldebaran. Next, the star may either explode as a supernova or may slowly collapse into a small, hot white dwarf star. The companion star circling Sirius is such a dwarf. Such stars are said to be very old.
2007-05-06 08:15:53 · answer #1 · answered by spaceprt 5 · 0⤊ 0⤋
Stars go through known phases, from Birth to death. The outcomes may be different, but they do not truly "evolve", as their lives are all the same as they have been since the first stars were born.
2007-05-06 09:27:19 · answer #2 · answered by quantumclaustrophobe 7 · 0⤊ 0⤋
not claims, sweetheart, but observable evidence. if you considered observation an attack, you better crawl back under your rock. yes, stars can be said to evolve in the sense that they change over time. biological evolution is the result of random genetic mutation - mutations that work get bred into the species, those that don't die off. stellar evolution is the result in changes of mass, density, etc. i'm not a scientist, but even i understand that scientific knowledge usually improves our lives, while dogma makes things worse, which leaves you as the attacker, not the 'evolutionaries'.
2016-05-17 04:55:30 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Yes they do. They go through nuclear fission and change in chemical compostion. They can take two paths after a protostar that change the final outcome, check out the link and you can see the different types ***
2007-05-06 08:30:15 · answer #4 · answered by *SnowQueen* 3 · 0⤊ 0⤋
They evolve so slowly compared to u they will last several million years.
2007-05-06 09:35:36 · answer #5 · answered by JOHNNIE B 7 · 0⤊ 0⤋
Yes they evolve. Iearned this just recently in science class
2007-05-06 08:22:29 · answer #6 · answered by TwilightFanGirl1 1 · 0⤊ 0⤋