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Stars have a lifecycle just like as below are the many steps involved in a stars evolution, from its formation in a nebula, to its death as a white dwarf or neutron star.
A nebula is a cloud of gas (hydrogen) and dust in space. Nebulae first step in a stars life. There are different types of nebula. An Emission Nebula such as a Orion Nebula, glows brightly because the gas in it is energised by the stars.
A star is a globe of gas producing its own heat and light by nuclear reactions. They are born from nebulae and are made up of mostly of hydrogen and helium gas. Stars have surface temperatures from 2000 C to above 30,000 C, and colours of the stars range from red to blue-white. Stars live for a million years or less before exploding as supernovae.
A Red Giant is a large bright star with a cool surface. It’s formed during the later stages of a star’s evolution. Red Giants have a diameter of between 10 and 100 times of the Sun’s. A Red Giant‘s surface temperature is in fact lower than the Sun’s.
A Red Dwarf is a very cold, faint small star. They are approximately one tenth of the diameter and mass of the Sun. they burn very slowly meaning they are estimated to live for a 100 billion years.
A White Dwarf unlike a Red Dwarf is a very small, hot star and is the last stage of a star like the sun’s lifecycle. The White Dwarfs have a mass similar to that of the suns, but only 1% of the sun’s diameter and approximately the diameter of the earth. The temperature if a White Dwarf is 8000 C or more.
A supernova is the explosive death of a star and often results in the star obtaining the brightness of 100 million suns for a short time.
There are two types:
Type I: These occur in binary star systems in which gas from one star falls on to a white dwarf, causing it to explode.
Type II: These occur in stars ten times or more as massive as the Sun, which suffer runaway internal nuclear reactions at the ends of their lives, leading to an explosion. They leave behind neutron stars and black holes.
Neutron stars are made up of neutrons and are produced when a Supernova explodes. When a Supernova explodes it forces protons and electrons to combine to produce a neutron star. The typical Neutron star has the mass of about three times the sun but a diameter of only 20 km.
Black Holes are believed to form from massive stars that are ending their life cycles. The gravitational pull in a Black hold is so great that nothing can escape its gasp not even light. Black holes distort the space around them and can often suck neighbouring matter.
A nebula is a cloud of gas (hydrogen) and dust in space. Nebulae first step in a stars life. There are different types of nebula. An Emission Nebula such as a Orion Nebula, glows brightly because the gas in it is energised by the stars.
A star is a globe of gas producing its own heat and light by nuclear reactions. They are born from nebulae and are made up of mostly of hydrogen and helium gas. Stars have surface temperatures from 2000 C to above 30,000 C, and colours of the stars range from red to blue-white. Stars live for a million years or less before exploding as supernovae.
A Red Giant is a large bright star with a cool surface. It’s formed during the later stages of a star’s evolution. Red Giants have a diameter of between 10 and 100 times of the Sun’s. A Red Giant‘s surface temperature is in fact lower than the Sun’s.
A Red Dwarf is a very cold, faint small star. They are approximately one tenth of the diameter and mass of the Sun. they burn very slowly meaning they are estimated to live for a 100 billion years.
A White Dwarf unlike a Red Dwarf is a very small, hot star and is the last stage of a star like the sun’s lifecycle. The White Dwarfs have a mass similar to that of the suns, but only 1% of the sun’s diameter and approximately the diameter of the earth. The temperature if a White Dwarf is 8000 C or more.
A supernova is the explosive death of a star and often results in the star obtaining the brightness of 100 million suns for a short time.
There are two types:
Type I: These occur in binary star systems in which gas from one star falls on to a white dwarf, causing it to explode.
Type II: These occur in stars ten times or more as massive as the Sun, which suffer runaway internal nuclear reactions at the ends of their lives, leading to an explosion. They leave behind neutron stars and black holes.
Neutron stars are made up of neutrons and are produced when a Supernova explodes. When a Supernova explodes it forces protons and electrons to combine to produce a neutron star. The typical Neutron star has the mass of about three times the sun but a diameter of only 20 km.
Black Holes are believed to form from massive stars that are ending their life cycles. The gravitational pull in a Black hold is so great that nothing can escape its gasp not even light. Black holes distort the space around them and can often suck neighbouring matter.