Austin prezi

How stars form

Formation

Stars form from clouds of dust. Turbulence in the clouds lifts the mass of dust and gas leading the mass to start to collapse under its own gravitational force. As the cloud collapse the material begins to heat up creating a protostar. The protostar has a hot core which will over time heat up and become a star.

A star's main sequence

Life

During a stars main sequence the stars are powered by a nuclear fusion of hydrogen to helium. The outflow of energy powers causes stars heat and provides the star with the pressure it needs to keep the star from collapsing under it's own gravitational force. During the a stars main sequence a star could be many different types of stars. The smallest star the could be is a red dwarf(10% the size of our sun), but the largest know is a called a hyper-giant( 100 or more time the size of our sun).

The stars fate

Fate/death

A stars fate starts when the star has fused all of its hydrogen in it's core. Once all the hydrogen is fused the stars nuclear reactions stop.With out the energy to support it the core begins to collapse into its self making the star much hotter. The increasingly hot core begins to push the outer layers outward expanding the star to a red giant. The massive stars can support some reactions but some reactions will only offer a temporary reprieve. Over time the star internal nuclear reactions will begin to burn furiously . This causes the star pulsate and to throw off the outer layers creating a cocoon out off gas and dust. Depending on the size of the core it could turn into many different things. Which you will see on the next slide.

Life cycle

Fun facts

Fun

Facts

The larger the star the shorter life it has

Our sun is in it's phase for approximately another 10 billion year

The majority of stars are red dwarfs

The mass of a star equals the temperature of a star which equals the color of a star Mass = temperature = color

Most stars come in pair because they form in pairs when in pairs they are called binary stars

Stars go out with a big bang

Video

Bibliography

Cain, Fraser. “Interesting Facts About Stars.” Universe Today, 4 May 2017, www.universetoday.com/25145/interesting-facts-about-stars/.

“Infographic: Life Cycles of the Stars.” Khan Academy, Khan Academy, www.khanacademy.org/partner-content/big-history-project/stars-and- elements/how-were-stars-formed/a/infographic-life-cycles-of-the-stars.

NASA, NASA, science.nasa.gov/astrophysics/focus-areas/how-do-stars-form-and-evolve.

Zuckerman, Catherine. “Everything You Wanted to Know about Stars.” Stars-Facts and Information, 20 Mar. 2019, www.nationalgeographic.com/science/space/universe/stars/.