Tools of Astronomy

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Tools of Astronomy
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Telescopes

• Most collect and focus light.
• Two types-
• 1. optical
• 2. radio

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1. Optical Telescopes

• Collect light
• Uses mirrors and lenses to make objects appear
  larger and brighter.

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2 Types of Optical Telescopes
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Refracting Telescope

• Convex lenses gather light and focus it in a
  small area.
• Used by Galileo in 1609.

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Reflecting Telescope

• Light enters the end and reflects on mirrors.
• Make observations through eyepiece.
• Used by Isaac Newton 1668

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Observatories

• Large buildings that store large optical
  telescopes

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2. Radio Telescopes

• Receives radio waves from objects in space.
• Can be used in all weather and at all times of day

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Satellites

• orbit around Earth
• collect information while in space
• Not affected by Earths atmosphere

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Space Probes

• Travel out of Earths orbit to collect info
• instruments are based on the goals of the
  mission

Mariner 10
Giotto
Luna
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Spectroscopes

• separates light of stars into bands of color.
• scientists can guess the gases/elements of the
  star.

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Reading Assignment-

• With your tablemate or alone,
• read pages 94-100 J in
• the pink book.