CELESTIAL MOTIONS Stars appear to move counterclockwise on the surface of a huge sphere – the Starry Vault, in their daily motions about Earth Starry Vault.

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Presentation transcript:

CELESTIAL MOTIONS Stars appear to move counterclockwise on the surface of a huge sphere – the Starry Vault, in their daily motions about Earth Starry Vault Polaris remains stationary. In Charlottesville we see Polaris 38 0 above the Northern horizon.

Daily Motion of Stars seen from Charlottesville

IMPORTANT TERMS Vernal Equinox Summer Solstice Autumnal Equinox Winter Solstice Ecliptic Sun Celestial Equator

LATTITUDE 38 0 NORTH Sunlight Earth Equator Charlottesville 38 0

MOON Siderial Period: Time for the Moon to orbit Earth and realign with a star. Equal to days. Synodic Period: Time for the Moon to orbit Earth and realign with the Sun. Equal to days. Zodiac: A band extending 8 0 on either side of the ecliptic. The Sun, Moon, and planets move through the zodiac.

Ecliptic Moon Sun MOON’S PATH THROUGH THE ZODIAC

PHASES OF THE MOON CrescentHalfGibbous Full

ECLIPSES Lunar eclipse Solar Eclipse MoonEarth Moon

LUNAR ECLIPSE

SOLAR ECLIPSE

MOTIONS OF THE PLANETS The five planets visible by naked eye are: Mercury Venus Mars Jupiter Saturn

VENUS RETROGRADE MOTION

VENUS AND MERCURY RETROGRADE MOTION

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