Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The...
-
Upload
lesley-spencer -
Category
Documents
-
view
215 -
download
2
Transcript of Tools of Astronomy. Electromagnetic Radiation Light travels as an “Electromagnetic” Wave The...
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.
Electromagnetic Spectrum(Energy Spectrum)
Infrared Ultraviolet
_____________ visible light_____________
Long waves ROY G BIV Short waves (infrared wavelengths) (Visible) ( Ultraviolet
Wavelength)
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.
Types of Telescopes
• Optical: gathers visible light
• Radio: gathers invisible energy
• Optical: use lenses and mirrors
collects and focuses light.
• Refracting Telescopes: Use lenses
• Reflecting Telescopes: Use Mirrors
Curved Mirrors
Example: Hubble space telescope
The largest telescopes are Reflecting
Hans Lippershey
• Invented the Telescope
Galileo
• First person to use a telescope to observe objects in the night sky.
Radio Telescopes
• Gathers invisible radio energy
Collects and focuses energy