Stars are created in huge dust clouds called nebulae. Then over the span of thousands of years. gravity causes small pockets of matter inside the nebulae to collapse. One of the masses inside of the nebulae is called a protostar. As the protostar shrinks, it spins faster and builds in pressure. Millions of years after this, the temperature of the core is around 15 million◦ Celsius (15,000,000). When the star is around this temperature, nuclear fission begins, this ignites the core and creates the star.
Red Giant Stars
A red giant is a star in the later stages of its life when it begins to cool down and expand. At this stage it begins to expand and consume any planets that are too close. In around 2 billion years are own sun will become a red giant and begin to expand and cool. Eventually the fusion in the core stops and the extreme gravity causes the star to ‘die’.
Blue Giant Stars
Blue Giants, are giant stars with a temperature of 10,000k or more. Although the term is used name many stars that are both bright and hot. The best-known example of a blue giant is Rigel the brightest star in the constellation of Orion.
Dwarf stars are stars that have a low or average luminosity, however the group also encompases many stars we would not normally consider as dwarf stars.
White dwarfs are stars that no longer fuse elements in their core, and the light given off by them is only remaining thermal radiation. White dwarfs are also very dense compared to the sun having a similar mass but being only about the size of Earth.
A Black dwarf is a theoretical stellar remmenant. It is a white dwarf that has cooled so much it no longer emits any thermal radiation. However the universe has not existed long enough for a
A neutron star is a giant star thats gravity has crushed it into an extremely dense star. Where the gravity is so intense that it is made entirely of neutrons. When it dies it dies in a massive explosion called a supernova.