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Introduction to the Night Sky. Spring 2007 Heart of the Valley Astronomers. Mercury. Venus. Saturn. Encaledus. Jupiter. Io and Eruptions. 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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introduction to the night sky

Introduction to the Night Sky

Spring 2007

Heart of the Valley Astronomers

planets versus stars
Planets versus Stars

Mars

Arcturus

Vega

Uranus

Planets appear as discs of light in a telescope. Stars look like smaller pinpoints.

how long would it take voyager ii
How long would it take Voyager II…

Neptune?

12 years

Sirius?

…to reach

About 180,000 years

planets are much closer
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

where do we get seasons
Where do we get seasons?

Solar energy

From the tilt of Earth as it spins