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Do Now. xquizidphotography.com. _____ The H-R Diagram is a graph that shows the relationship between a star’s surface temperature and absolute magnitude _____inner atmosphere of the sun _____loops of gas that jump from sunspots _____ how bright a light looks, or appears.

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  1. Do Now xquizidphotography.com _____ The H-R Diagram is a graph that shows the relationship between a star’s surface temperature and absolute magnitude _____inner atmosphere of the sun _____loops of gas that jump from sunspots _____ how bright a light looks, or appears. _____composition of the sun

  2. 1. How is a star born? • 2. When is a star in the main sequence stage? • 3. What are blue stars? • 4. What is a red dwarf? • 5. When does a star get old? • 6. How does a star die?

  3. How is a star born? 1. A star is born from a collapsing nebula from heat and pressure

  4. When is a star in the main sequence stage? • 2. A star is in the main sequence stage when nuclear fusion begins. • Longest and most stable part of a star’s life

  5. What are blue stars? • 3. Blue Stars • Very massive • Quickly uses hydrogen • Expands and turns into a giant or supergiant

  6. What is a Red Dwarf? • 4. Red Dwarf • Low mass, cool, dim • Some of the oldest stars

  7. When does a star get old? • 5. A star gets old when • Runs out of hydrogen. • Center shrinks • Grows large and cools • Very massive become red giants or supergiants

  8. How does a star die? • 6. A star dies when • Fusion stops • Core glows • becomes a white dwarf which is small and hot • Outer layers drift away from core • When white dwarf stops glowing it becomes a brown dwarf

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