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The Life Cycle Of Stars
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Small & Medium Mass Stars
Planetary Nebula Red Giant Small Star White Dwarf Neutron Star Protostar Interstellar Cloud Black Hole High Mass Stars Large Star Supernova Red Super Giant
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Life Cycle of Small & Medium Mass Stars
Planetary Nebula Red Giant Small Star White Dwarf Protostar Interstellar Cloud
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Interstellar Cloud An interstellar cloud is an area of space that accumulated a lot of dust and gas They are stellar nurseries, a place where new stars are born. Video: Stars being born in the Great Orion Nebula A nebula is a type of interstellar cloud
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Protostar Formation The cloud of gas & dust begins to clump together due to gravity, and gives off light due to internal heating. This clump is called a Protostar. Video: Protostar Formation
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Star Formation The gas and dust in a Protostar keeps clumping together due to gravity until its tight enough to undergo nuclear fusion & forms a star.
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10 to 1,000 times the size of our Sun
Red Giant Formation Eventually, the star runs out of hydrogen and begins to fuse helium; creating a surge in energy which causes the star to grow into a Red Giant. 10 to 1,000 times the size of our Sun Video: Sunrise in 7 Billion Years
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Planetary Nebula
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Planetary Nebula: The Death of a Star
When the star runs out of helium, it gives out a large burst of energy and pushes its atmosphere into space, creating a Planetary Nebula. Videos: 1. Planetary Nebula 2. Zoom into Planetary Nebula NGC 5189
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White Dwarf: The Dead Star’s Remains
1,000,000 times smaller than our Sun. When the atmosphere was pushed into space, the core remained behind, creating a White Dwarf. But with almost the same mass. Video: How does this whole thing Happen? White Dwarf
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Life Cycle of Massive Stars
Neutron Star Protostar Interstellar Cloud Black Hole Large Star Supernova Red Super Giant
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Large Star Formation Big or small, all stars form the same way:
Gas and dust collapses due to gravity. A large star forms when a lot more gas and dust collapses.
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Red Supergiant Formation
Just like a small star, a large star will run out of hydrogen, but if the star is at least 10 times as massive as our Sun, it will become a Red Supergiant. Video: The Red Supergiant Betelgeuse vs. the Solar System 200 to 1,500 times the size of our Sun
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Supernova
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Supernova: The Death of a Red Supergiant
Unlike a small star, when a large star runs out of helium, it will fuse other elements. When they run out, gravity will collapse the star so quickly, it will create a massive explosion called a Supernova. Videos: What is a Supernova? What will Betelgeuse Supernova look like from Earth?
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Neutron Star: Death of Massive Stars
The inner core of a supernova can collapse, squeezing electrons and protons together into an entire star made out neutrons. Neutrons Protons Videos: What are neutron stars? Neutron Star vs. Manhattan Electrons
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Black Holes: Death of Super-massive Stars
If a super-massive star goes supernova, all of its material will collapse back in on itself into a smaller sphere than it was before and create a Black Hole. A black hole is invisible because nothing, not even light can escape. Videos: How black holes work Neutron Stars vs. Black Holes
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Small & Medium Mass Stars
Planetary Nebula Red Giant Small Star White Dwarf Neutron Star Protostar Interstellar Cloud Black Hole High Mass Stars Large Star Supernova Red Super Giant
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