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Telescopes

Telescopes. The most common type of telescope is the optical telescope (collect visible light) Two Types of optical telescopes: Refracting (lenses) Reflecting (mirrors). Refracting Telescopes. Reflecting Telescopes.

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Telescopes

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  1. Telescopes • The most common type of telescope is the optical telescope (collect visible light) • Two Types of optical telescopes: Refracting (lenses) Reflecting (mirrors)

  2. Refracting Telescopes

  3. Reflecting Telescopes • There is less error in a reflecting telescope because light never passes through glass.

  4. Other types of Telescopes • Radio Telescopes – detect radio waves • Uses an array of satellite dishes to collect radio waves.

  5. Other types of Telescopes • Infrared Telescope – detects heat

  6. Space Telescopes • Hubbell Space Telescope • Spitzer Space Telescope

  7. Images from the Hubble Space Telescope

  8. Images from the Spitzer Space Telescope

  9. Meteors, Meteorites and Meteoroids • All three are the same object, just found in different locations

  10. Meteoroid • Rocky fragment floating through space • Large as a boulder or small as a grain of sand • Has no orbit

  11. Meteor • The light created as a meteoroid passes through a planets’ atmosphere. • Also called “Shooting Stars.” • 5-15 can be seen nightly. • ~ 100 million enter the Earth’s atmosphere daily • Add several tons to the Earth every day • When many enter at once it is called a meteor shower. (generally from a comets’ tail)

  12. Meteorite • Meteor that strikes a planet’s surface • Made of stone or iron or a mixture of both (weigh several ounces to 35 tons) • Most are found in Antarctica

  13. Hoba Meteorite – 66 tons

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