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superweirdo
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Someone told me stars are formed by black hole, yet, I didn't believe him, are they really?
star.torturer said:when they heat up enought they start fission of hydrogen
superweirdo said:Check this link out, that how he proved it to me.
http://www.space.com/scienceastronomy/mystery_monday_050207.html
New observations portray black holes as Jekyll and Hyde characters. They can be creators as well as destroyers.
The classic view of black holes conjures images of gas and stars and even light being swallowed. That's why they're black. But when black holes feed, they create powerful high-speed jets that race at nearly light-speed into surrounding space.
Like a jolt of electricity breathing life into Frankenstein's monster, a black hole's jets can ignite star formation.
Wil van Breugel and Steve Croft of the Lawrence Livermore National Laboratory studied one of these jets slicing through a puzzling region of intense star formation known as Minkowski's Object. The jet, they say, caused a dense gas cloud to collapse and trigger the star birth.
Please start at http://www.astronomynotes.com/evolutn/s2.htm" for a decent answer to your questions so far. After reviewing that, you might have some more specific questions.(?) That website has nice pictures too...superweirdo said:But since everytime stars die, they turn into black hole and black hole gives off the stuff needed to make the stars, doesn't it make most of the stars?
superweirdo said:But since everytime stars die, they turn into black hole and black hole gives off the stuff needed to make the stars, doesn't it make most of the stars?
chroot said:Only very massive stars (more than twenty-five times the mass of the Sun) have the potential to become black holes when they die. Most stars do not become black holes, becoming instead only white dwaf stars or being ripped to shreds in a supernova explosion.
superweirdo said:Wait a sec., supermassive stars become normal black hole then what kind of stars make up supermassive black hole. I thought that whenever a star dies, it becomes a black hole and the bigger a star is, the bigger the balck hole is.
It is generally thought that making primordial SMBHs is difficult to explain and those that do exist may have formed by multiple mergers.chroot said:Supermassive black holes may be of primordial origin, born long before the universe cooled enough to to allow stars to form. On the other hand, they could be simply normal black holes that have absorbed a large amount of matter after formation. The supermassive black holes suspected to exist at the centers of galaxies are almost certainly of primordial origin, and served as the "attractors" that pulled galaxies together in the early universe.
Perhaps one of our resident astronomers can expand more on the topic?
- Warren
Supermassive black holes may be of primordial origin, born long before the universe cooled enough to to allow stars to form. On the other hand, they could be simply normal black holes that have absorbed a large amount of matter after formation. The supermassive black holes suspected to exist at the centers of galaxies are almost certainly of primordial origin, and served as the "attractors" that pulled galaxies together in the early universe.
Many people believe that stars are formed from the remnants of supernovae, but in reality, this only accounts for a small percentage of star formation. Another common myth is that stars are formed from the collision of galaxies, when in fact, stars are formed within galaxies through the collapse of gas and dust clouds.
Stars form through the process of gravitational collapse. A large cloud of gas and dust contracts due to its own gravity, causing the temperature and pressure at the center to increase. This triggers nuclear fusion, and a new star is born.
Protoplanetary disks are flat, rotating disks of gas and dust that surround young stars. They play a crucial role in the formation of planets, as the dust particles within the disk clump together to form larger bodies, eventually leading to the formation of planets.
The time it takes for a star to form varies depending on its mass. Low-mass stars, like our sun, can take several million years to form, while high-mass stars can form in just a few hundred thousand years.
Yes, stars can continue to form throughout their lifetime. This is known as "stellar recycling" and occurs when older stars shed their outer layers, which then mix with gas and dust in the interstellar medium, eventually forming new stars.