Introduction to the Night Sky

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Introduction to the Night Sky

• Spring 2007
• Heart of the Valley Astronomers

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Mercury
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Venus
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Saturn
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Encaledus
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Jupiter
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Io and Eruptions
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Planets versus Stars
Mars
Arcturus
Vega
Uranus
Planets appear as discs of light in a telescope.
Stars look like smaller pinpoints.
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How long would it take Voyager II
Neptune?
12 years
Sirius?
to reach
About 180,000 years
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Planets are much closer
Neptune 2.8 billion miles
How does this compare to a walk on Earth?
The Corvallis Clinic
Think about a walk from Wilson School to
versus
Sirius almost 19,000x farther than Neptune 52
trillion miles
The South Pole
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Star Colors Temperature
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Nebula Gas Clouds
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Leos Galaxies
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Where do we get seasons?
Solar energy

• From the tilt of Earth as it spins

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Telescopes!
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Earths air stops a lot of energy!
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Refractor Telescope
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Reflector Telescope
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Schmidt-Cassegrain Telescope
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Getting Started