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Astronomy Final Project

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Astronomy Final Project - Page Text Content

FC: Stellar Lifcycle Project: Rigel | by Angel Madrigal

1: Rigel is a blue-white super giant. Its mass is 7.84. and it is 130,000 times more luminous then our sun. | Hertzsprung-Russel_StarData.png (567 600 pixels, file size: 522 KB, MIME type: image/png)

2: Stars are made of Hydrogen and Helium. The gas gets put under very high pressure by gravity.The Pressure gets so high that the hydrogen atoms can fuse into helium atoms. The energy from the fusion takes place in the center of the star, it then travels outward as light, heat, and radiation.The outward and inward pressure in the fusion process balance each other out by using the gravity in the star. The process in which the star is made, depends on the stars size. In stars smaller than our sun, the fusion occurs with a proton-proton chain. In stars larger than our sun the fusion happens in a CNO cycle. | General Info about stars:

3: How Stars are Formed: | Stars are formed from particles of gas and dust some times referred to as stellar nurseries. Momentum and Gravity work together to pull gas and dust to a middle point which then becomes a protostar.When the inside of a protostar reaches a temperature high enough for the hydrogen to fuse into helium the star is at this point is a stable star and becomes a main sequence star.

4: Protostars: | | Protostars that have 0.08 less than the mass of our sun dont reach temperatures high enough to be able to fuse. These stars are referred to as brown dwarfs. Protostars that contain 200 times more mass than our sun also have allot of inside pressure that overwhelms their gravity wich causes them to throw their outer layers into space eliminating the possibility of becoming main sequence stars.

5: Main Sequence Stars | Main sequence stars have the ability to convert hydrogen atoms to helium for billions of years. They are also known as stable stars. Eventually a stable star uses up all of its hydrogen, it then expands its outer layers and becomes a red giant star.

6: it then ejects its outer layers into space. The outer layers are referred to now as planetary nebulas they form a glowing cloud of debree around a white dwarf. | A white dwarf is really heavy material, one teaspoon of it on earth would equal 5 tons. | It then cools down until it is bearly visible anymore and it becomes a black dwarf.

8: | Blue Super giants have extremely high temps. They have average temperatures ranging from 20 000-45 000 F. | Blue super giants like rigel are formed from large, dense, very hot cores. | Protostars containing less than 0.08 the mass of the sun dont go through the fusion process because they never get high enough temperatures. these stars are called brown dwarfs

9: Process leading to the death of this kind of star: | The take approximately 100million years to burn out

10: Time Line of Rigel in each stage:

11: | | | | Refrences

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  • By: Angel M.
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  • Title: Astronomy Final Project
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  • Published: over 5 years ago