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ASTR Notes

ASTR Notes - -Con(together Stella(star =...

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Summary - Constellation - Rotation of the earth - Speed of light Reading Ancient observers -Ancient humans observe the sky -They noticed that the sun rises every day in the east and sets in the west. -The moon also rises in the east and sets in the west -The stars also rise in the east and set in the west WHEN THEY ASK THEMSELVES “WHY?”, ASTRONOMY WAS BORN. Earth rotates on its axis once per day -Today we understand that the sun rises and sets due to the rotation of the earth. The Earth rotates toward the east making the sun appear to move west until it sets. The same is true for the moon and the stars. Constellations - In ancient times, people saw patterns in the stars. - They named these constellation for things that were important to their culture.
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Unformatted text preview: -Con-(together) Stella (star) = constellation-Different culture saw different patterns-Later, astronomers defined these constellations precisely, and still use them to identify parts of the sky. Sagittarius the archer/ Scorpius the Scorpion Orion -Stars were given names by ancient people-They are also classified using Greek letters:-CX - Alpha designates the brightest star in a constellation.-Big dipper= looks like a hand + bucket-Ursa Major: The Great Bear (a.k.a. The Big Dipper) Ursa Minor = little dipper Two stars in the big dipper point to an important star: Polaris ....
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ASTR Notes - -Con(together Stella(star =...

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