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15 Cards in this Set

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Solar Noon
Occurs when the sun is in its highest position of it's arc
Solar Time
time kept by the suns location in the sky.
lunar month
The 29.5 days from one new moon to the next.
umbra
the darkest parts of the earth's and moon's shadows. Where a total lunar eclipse occur
penumbra
the lighter part of the earth and moon's shadows
aphelion
The point farthest the sun in the orbit of the Earth
perihelion
The point nearest the sun in the orbit of the Earth
summer solstice
winter soltice
spring equinox
fall equinox
summer-June 22
winter-December 21
spring- March 21
fall- September 22
Tropic of Cancer and Capricorn
The most north(cancer) and south(capricorn) of the equator that the sun can shine directly overhead
zenith
directly above head
tilt of axis of Earth
The Earth's axis is titled 23.5 degrees, the tilt is what causes our seasons.
perigee
When the moon is closest to Earth.
apogee
When the moon is farthest from Earth.
waxing
the moon phase from a new moon to a full moon.
waning
the moon phase from the full moon back to a new moon.