A star of one solar mass starts with hydrogen in the core that with eventually run out and form helium. Helium then forms carbon and oxygen and expands. A one solar mass star will live a long life and becomes a white dwarf that slowly cools and dims. Larger 20 solar mass stars live shorter lives. The carbon turns to neon, then silicon and finally to iron before it explodes.
That's a good question. Average star would fall in the center of the main sequence in the Herzsprung Russell diagram. I believe about eight billion years. Stellar evolution is determined solely by size of a star. The larger a star the shorter and more violent the life. I remember frontiers of astronomy Fred Hoyle theorizing 1.41 solar masses Being the tipping point of the path of evolution. A large star may only have a life of perhaps a million years
-average size
-expands and becomes a red giant
-cools and contracts, becomes a white dwarf star
-massive sized stars
-swell and become red supergiants
-explode (called a supernova)
-become a black hole
-become a neutron star
It forms, (gives life), collapses and turns to a neutron star.
A neutron star is under such force that it weighs the same as it did before it collapsed, not sure about the weight thing though, but it weighs a lot more than it looks.
A neutron start is 10-20 miles across and a tea spoon of neutron star weighs more than the weight of all the cars of the Earth conbined!
All stars form the same way. Gravity eventually pulls in the material from the nebula in which the star forms. When these materials come together, they cause rotation. Rotation causes heat, which leads to the glowing we see. Eventually the inner material cools down, compresses, and nuclear fusion starts, forming new elements. This is known as the Red Giant phase. The more massive the star, the shorter the life. Supermassive stars eventually explode into supernovas, until eventually the remnants form a black hole.
Protostar
The size of a star is determined by how much matter is available in its parent nebula.
Main Sequence
When the protostar is sufficiently hot and dense, the process of hydrogen fusion begins taking place in its core.
Red Giant
When the star's core runs out of hydrogen, gravity has its way once more that is.
Supernova
Nuclear reactions cease forever when the star's core is reduced to iron; that element will not fuse without additional energy supplies.
Neutron Star
Meanwhile, what's left of the star has shrunk to a diameter no larger than a few kilometers about the size of a city. At this density, the outward pressure generated by protons and neutrons reacting to compression is finally sufficient to halt gravity. The star is so dense that, if you could bring a teaspoon of its material to Earth, it would weigh a trillion tons.
Low Mass Stars - Protostar > Main Sequence > White Dwarf
(Low Mass Stars has about 80 Billions Years of Cycle only for 0.001 metal stars)
Medium Stars - Protostar > Main Sequence > Hertzsprung Gap > Giant Branch (Red Giant) > Core Helium Burning > First Asymptotic Branch > Second Asymptotic Branch > White Dwarf
(the medium Star is a sun like star with 11 billion years of cycle)
The smaller the star, the cooler it burns and the longer it lives. Very small "brown dwarf" stars may have life expectancies longer that the universe itself.
"Average" stars (and we're not sure how big "average" stars are, because we cannot see most of the small, dim ones!) like the Sun may last for 9-10 billion years.
Massive stars "live fast and die young"; a star like Betelgeuse (the red supergiant star at the shoulder of Orion the Hunter) is probably only a few million years old, and will likely die spectacularly in a supernova explosion within another few thousand years or so. It could happen any time!
eventually expand into a red giant, and then collapse into a white dwarf with a planetary nebula
It depends on the star. The bigger the star, the less life it has.
A white dwarf.
A star that was 150 solar masses would spend the main part of its life as a main sequence star before collapsing into a white dwarf. A stars mass determines the life expectancy as well as its probable cause of death.
this is simple its used to describe the star sizes through a process that is complicated and people see this through the life cycle of a star as the minerals inside the star change over time
if there were no solar system then there would be no life?
Rigel, or to be more precise, Rigel-A is a blue white super giant which started life with around 24 solar masses. , over a period of around 8 million years it has exhausted its hydrogen and has moved into the blue super-giant zone of the H-R diagram. It is expected to end its life as a type II supernova.
describe the four stages of the hypothesis for the origin of life on earth by chemical evolution
puberty
A white dwarf.
-Electricity -Solar -Water -Fossil
-Electricity -Solar -Water -Fossil
A star that was 150 solar masses would spend the main part of its life as a main sequence star before collapsing into a white dwarf. A stars mass determines the life expectancy as well as its probable cause of death.
From approximately 1.5 to 2.0 solar masses snow FAR
dormant ("sleeping ") ,ative, extinct :p i smart!
Supernova. Stars below nine solar masses become white dwarfs, though stars more than 1.4 solar masses (Chandrasekhar limit) should nova during their life time. http://en.wikipedia.org/wiki/Supernova http://en.wikipedia.org/wiki/Chandrasekhar_limit
A massive star. Usually any star with more that 9 solar masses will explode as a supernova.
The Stages of Life was created in 1835.
yes flyers do have life stages