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How Big?

How Big?. A look at the size of the universe. Name some of the objects we have talked about…. How big are each of them. Lets put these into order from largest to smallest. . Are there any other items to add to the list?. The Universe. How big is the universe? Do we really know…

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How Big?

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  1. How Big? A look at the size of the universe

  2. Name some of the objects we have talked about… • How big are each of them. • Lets put these into order from largest to smallest.

  3. Are there any other items to add to the list?

  4. The Universe • How big is the universe? • Do we really know… • Observable Universe • 13.7 billion light years across. • How do we know this? • Stellar parallax measurements and calculations based on red shift.

  5. Galactic Clusters • Super Clusters • Groups of Groups of galaxies • Some argue that these are the biggest things in the universe, but we know better! • Regular cluster • A grouping of galaxies • 100 billion times the volume of the Milky Way

  6. Super Cluster • We are part of the Virgo Super Cluster • This is BIG!!!! • These groupings stick together under their own gravitational attraction • Made of many smaller groups of Galaxies

  7. Regular Galactic Clusters • We are a part of what we call “Local Group” • There are at least 28 galaxies in our local group.

  8. Galaxies • Milky Way • 100,000 Light years across and 10,000 light years thick • This one is ours • Spiral shaped • Other galaxies take on different shapes for many different reasons • Made of stars

  9. Nebulas • In my estimation, some of the most beautiful things in the universe • Clouds of gas that are left after a star goes out • Gravity pulls some together from surrounding areas

  10. Stars • Huge range in size and color • From 1500 times the size of the sun to only slightly larger than Jupiter • From dull brown all the way up to bright blue

  11. Gas Planets • Jupiter, Saturn, Neptune, Uranus • Planets that orbit a star and are made of mostly gas. • Typically quite large compared to Earth. • Tend toward the outside of a system

  12. Rocky Planets • Mercury, Venus, Earth, and Mars • Smaller than the gas giants • Surfaces hold at least some atmosphere • Made of solid materials

  13. Moons • There are to many to name here. Suffice it to say that there are many and they are varied.

  14. Comets and Asteroids • Majority of our asteroids are in the Asteroid belt. • Small chunks of rock left over from the formation of our Solar System • Comets- chunks of ice and dirt that orbit our Sun out into deep space.

  15. Gas and Particulates

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