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

8. Images from the Hubble Space Telescope

9. Images from the Spitzer Space Telescope

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

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

12. 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)

13. 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

15. Hoba Meteorite – 66 tons