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5.ESS1: Earth’s Place in the Universe

5.ESS1: Earth’s Place in the Universe 1) Explain that differences in the apparent brightness of the sun compared to other stars is due to their relative distances from the Earth. Stars. What is a star?

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5.ESS1: Earth’s Place in the Universe

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  1. 5.ESS1: Earth’s Place in the Universe • 1) Explain that differences in the apparent brightness of the sun compared to other stars is due to their relative distances from the Earth.

  2. Stars • What is a star? • Most stars look like faint dots of light in the night sky. But stars are actually huge, hot, glowing gases that produce their own heat and light.

  3. So Bright! • Our sun is only average in brightness and size compared to all the other stars in the universe • For Example, the star Deneb, is close to 200,000 times brighter and 200 times larger than the sun. • These stars are extremely far away, making them appear dimmer. • Deneb appears fainter than the sun because it is a much greater distance from Earth than the Sun.

  4. Factors that influence brightness • 1. Distance • 2. Size

  5. Misconception Alert • Some may incorrectly interpret that stars that are farthest away are always the dimmest in the night sky. • Remember that the size of a star must be considered when discussing the brightness of stars. • Some of the farthest stars are brighter than stars that are closer because they are larger.

  6. Term to know: Light-year • Light year is not a measure of time, but of distance.. • A light year is the distance light travels in a year. • This is the distance light must travel to reach Earth.

  7. Stars are classified by brightness and magnitude

  8. types and classifications of stars • Blue Giant- a blueish star that has a high surface temperature and a diameter that is large relative to t he sun. • Super Giant- a very large star that is even brighter than a giant, often despite being relatively school. • Red Giant- a very large star of high luminosity and low surface temperature. • White Dwarf- a small very dense star that is typically the size of a planet.

  9. http://studyjams.scholastic.com/studyjams/jams/science/solar-system/universe.htmhttp://studyjams.scholastic.com/studyjams/jams/science/solar-system/universe.htm • https://www.brainpop.com/science/space/constellations/

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