Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The...

10
Tools of Astronomy

Transcript of Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The...

Page 2: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

Electromagnetic Radiation

• Light travels as an “Electromagnetic” Wave• The light you see is called Visible Light• Speed of light: 186,000 Miles/Second• Spectrum: the different colors and wavelengths

of light.

Page 3: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

Electromagnetic Spectrum(Energy Spectrum)

Infrared Ultraviolet

_____________ visible light_____________

Long waves ROY G BIV Short waves (infrared wavelengths) (Visible) ( Ultraviolet

Wavelength)

Page 4: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

Spectroscope• Splits light – into it’s “Colors”

• Identifies:

1. Elements that make up a Star

2. Star Temperature

Prism: triangular piece of glass that splits up

light.

Page 5: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

Types of Telescopes

• Optical: gathers visible light

• Radio: gathers invisible energy

• Optical: use lenses and mirrors

collects and focuses light.

Page 6: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

• Refracting Telescopes: Use lenses

Page 7: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

• Reflecting Telescopes: Use Mirrors

Curved Mirrors

Example: Hubble space telescope

The largest telescopes are Reflecting

Page 8: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

Hans Lippershey

• Invented the Telescope

Page 9: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

Galileo

• First person to use a telescope to observe objects in the night sky.

Page 10: Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The light you see is called Visible Light Speed of light: 186,000.

Radio Telescopes

• Gathers invisible radio energy

Collects and focuses energy