Life of a Star

1. Life of a Star 🌟 By: Stacia Deutsch And RhodyCohon.

2. Introduction. 📕 • Constellations are grouplings of stars. • Stars gather in groups called galaxies. • Our solar system is compromised of everything that orbits the sun like planets.

3. Birth of a Star 💫  • The unaided human eye can see only a few thousand stars at a time. • The spectral class types for stars are labeled O,B,A,F,G,K, and M. • To sort stars, scientists look at their temperatures. • Our sun is a class G yellow star.

4. Birth of a Star ✨ • All stars begin a Nebula. • Nebulas contain mainly hydrogen gas and a small amount of helium gas. • Dark nebula clouds are often large.

5. Protostar⭐ • During this phase a new star is called a protostar. • The energy creates large, powerful jets of gas called bi-polar outflow. • Sometimes stars form in clusters.

6. Main Sequence of a Star. • A star’s mass determines whether it moves on to the next stage. • A main sequence star develops a core temperature of millions of degrees. • As long as the star stays in equilibrium, it will remain a main sequence star.

7. Parts of a Star 💥 • It takes about 170,000 years for them to make it out of the star. • Sunspots are dark, cool areas on the photosphere. • Solar flares are sudden, violent explosions on the sun.

8. Red Giant Stage🌅 • Most red giants are red but others can be orange or yellow. • Aledebaran, a red giant is one of the brightest stars in the night sky. • Some red giants may regain stability for a while.

9. Convective Zone. • This layer is less dense and cooler than the radioactive zone. • It takes a single photon only about ten days to reach the next level. • These convection currents make the surface of the next level.

10. Corona. • The temperature of the corona averages 3.5 degrees. ☀  • This is the collection of gases around the sun. • It is much hotter than the core.

11. Nuclear Fusions. • Nuclear fusion creates very light, nonelectric charges called neutrinos. • By studying these neutrinos, scientists learn about fusion inside the stars. • A proto star cannot begin nuclear fusion without enough mass or heat.

12. Death of a Star • Star enters it’s final life stages as it runs out of fuel. • Without, fuel a star cannot perform the same amount of nuclear fusion as it once did. • It cannot stay in equilibrium.

13. White Dwarfs • A white dwarf temperature slowly cools down over the next billion years. • It emits very little light. • At first, white dwarfs are so hot that they still glow.

14. Black Dwarfs • There are no known black dwarfs in our universe. • All that will remain is a black lump of carbon, known as a black dwarf. • Scientists think it takes so long for a while dwarf to cool, that no black dwarfs have been created yet.

15. Red Super giants.. • Red super giants begin to die like red giants do. • Their gravity causes the outer layers to collapse inward. • Unlike red giants, stellars winds are common and strong on a red super giant.

16. Supernovas • A supernova is caused in the star’s cove. • The iron is too heavy for fusion to continue. • The energy is released as extremely bright supernova

17. Questions❓ • How do galaxies hold so many stars? (Ch 1-1)

18. Questions❓ • How do stars seem to twinkle?(Ch 1-2)

19. Questions❓ • Why do stars come in clusters? (Ch 1-3)

20. Questions❓ • Why does stars form in hot temperatures? (Ch 1-4)

21. Questions❓ • How does gravity pull stars closer??(Ch 2-1)

22. Questions❓ • Why can’t astronomers be sure why disk disappear? (Ch 2-2)

23. Questions❓ • Why can’t you be sure when you see a brown dwarf? (Ch 2-3)

24. Questions❓ • Why are sunspots cool? (Ch 2-4)

25. Questions❓ • Why is the collection of corona gases surrounded around the sun? (Ch 3-1)

26. Questions❓ • Why do scientists have to use a special measurement for long distances? (Ch 3-2)

27. Questions❓ • How do stars get there color? ( Ch 3-3)

28. Questions❓ • Why aren’t all giants red? (Ch 3-4)