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Transcript
Tools of Astronomy 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 (infrared wavelengths) ROY G BIV (Visible) Short waves ( 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
