Nebula Life Cycle

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The Life Cycle of Our Star

Nebula
What is a nebula? A nebula is the birth of a new star. Cloud of gas and dust in space.
Mostly made up of Hydrogen and Helium. The cause of a nebula has come from a huge collapse of gas, also known as Interstellar Medium. A nebula’s lifecycle is less than 1 million years old before they burst into a supernova.

Because of gravity Nebula forms a star

Protostar
Giant clouds form around a star that creates pressure--nebula. Differences in temperature create a gravitational collapse which creates protostar

A protostar is formed when gravity causes the dust and gas of a nebula to clump together in a process called accretion

As gravity continues to pull ever more matter inward towards the core, its temperature, …show more content…

This is the beginning of a new star. It is a giant cloud of dust and gas that is mostly made up of hydrogen and helium. The creation of a Nebula is caused by a collapse of gas, also known as Interstellar Medium. A Nebula can live up to a million years old before they turn into a …show more content…

That’s older than my grandma,” said Ralphie.

“Excellent observation Ralphie,” said Ms. Frizzle. 3 page
PROTOSTAR

“Aside from Ralphie’s sidecomment, we are now moving on to the second stage of a star, the Protostar,” said Ms. Frizzle.

This is the protostar. A process called accretion occurs when a gravitational collapse causes dust and gas of a nebula to clump and then a protostar is formed. Say a star has an equivalent weight to our sun, that means that that star was a protostar for more than 10 million years. During the process of a protostar, gravity pulls more matter inward towards the core, which cause its pressure, density, and temperature to rise. Nuclear Fusion then begins once the high temperatures in the core of a protostar is reached, from then, a star is born.

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STABLE STATE

At last, we have reached the most relaxed area of a star. This area is called the Stable State. Our star, the sun is currently at its stable state and will be for another 3-5 billion years. The stable state is the longest period of the life of a star. When a star is at it’s stable state, it is constantly burning its fuel out. Once all the fuel burns out of the star, it means that the star has reached the red giant

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