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The stages of a stars life cycle are main sequence, red giant and white dwarf. Stars start out with a nebula, which is a large cloud of gas and dust that soon collect into a star. This causes the first and longest stage of a stars life, the main sequence. After this stage, stars expand into a red giant, the shortest stage of a stars life.
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1) a star is formed by a swirling nebula. 2) gravity causes dust clouds to contract into itself. 3) As the Mass increases the pressure at the center causing an increase in temperature. 4) when the temperature reaches 1 million degrees Celsius nuclear fusion begins. 5) Mass begins to glow and star gives off heat and light.
A hundred years ago, scientists did not know that stars are powered by nuclear fusion, and 50 years ago they did not know that stars are continually forming in the Universe. Researchers still do not know the details of how clouds of gas and dust collapse to form stars, or why most stars form in groups, or exactly how planetary systems form.
All stars begin life in the same way. A cloud of dust and gas, also known as a nebula close nebula A cloud of gas and dust in outer space. If massive enough, these can collapse under gravity to ...
Sep 24, 2024 · Formation of Stars Nebula Formation. Stars begin their life cycle as a big cloud of dust and gas known as a nebula. The attractive force of gravity gradually pulls the dust and gas together. This process leads to the formation of a protostar. Protostar Evolution. As particles collide and join the protostar, it grows in size.
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Red. Blue. Yellow. Green. A star at the stage in its life cycle when it stops burning hydrogen, begins burning bigger elements, and grows much bigger to a large, low-density star. In a large mass star, the temperature reaches more than 100 billion degrees. The repulsive forces between the iron nuclei cause a massive explosion sending the star ...
