telescopes were first invented around the year 1600. galileo galilei was an early astronomer who...

8
Telescopes

Upload: emery-mckinney

Post on 03-Jan-2016

212 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

Telescopes

Page 2: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

• Telescopes were first invented around the year 1600.

• Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system.

• He made many important discoveries including: the moon was covered in mountains and Jupiter had 4 large moons.

Galileo, Galileo

Page 3: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

• Telescopes are instruments that collect and focus light and other forms of electromagnetic radiation.

• Electromagnetic radiation is the invisible energy waves on the electromagnetic spectrum.

• A telescope that uses lenses and mirrors to collect and focus visible light is called an optical telescope.

• The two main types of optical telescopes are refracting telescopes and reflecting telescopes.

Modern Telescopes

Page 4: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

Electromagnetic Spectrum

Page 5: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

REFRACTING REFLECTING

• A reflecting telescope, or reflector, uses mirrors instead of glass lenses.

• The mirrors bounce light rays to focus them.

• These were developed by Sir Isaac Newton around 1670.

• The majority of telescopes used today are reflectors

• A refracting telescope, or refractor, is a telescope that uses glass lenses to collect and focus light into an image

• These glass lenses bends light rays to focus them.

• These were the earliest type of telescopes, used by Galileo to study objects in our solar system

Refracting vs. Reflecting telescopes

Page 6: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

• Simply put, radio telescopes are different from reflecting or refracting telescopes in that • they detect radio waves instead of

light waves

Radio Telescopes

Page 7: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

• Since Earth’s atmosphere blocks many wavelengths of invisible light, astronomers have placed telescopes in space.

• These telescopes include the Hubble Space Telescope, the Chandra X-Ray Observatory, and the Spitzer Space Telescope.

• These different telescopes each observe a different wavelength on the electromagnetic spectrum (the spectrum of all visible and invisible light).

Telescopes in SPACE

Page 8: Telescopes were first invented around the year 1600. Galileo Galilei was an early astronomer who first used telescopes to view objects in our solar system

Which is Which?Use your textbook to find the differences between the following three:

 

Hubble Space Telescope

 

Chandra X-Ray Observatory

 

 

Spitzer Space Telescope