Astronomy Vocabulary!!!!

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sphere, Aristole, cresant, axis, moon phases,.......... definition from: Astronomy by Glencoe Science

Sphere

a round, three-dimensional object

Aristole

A Greek astronomer and philosopher who lived around 350 B.C., suspected that Earth was spherical. He observed that Earth cast a curved shadow on the Moon durning a eclipse.

axis

Earth's axis is the imaginary vertical line around which Earth spins.

Rotation

the spinning of Earth on its axis

revolution

Earth's yearly orbit around the Sun

Ellipse

an elongated, closed curve

solstice

the day when the Sun reaches its greatest distance north or south of the equator

Equinox

occurs when the Sun is directly above Earth's equator

Moon Phases

are different forms that the Moon takes in its appearance from Earth

New Moon

occurs when the Moon is between Earth and the Sun

Full Moon

occurs when all of the Moon's surface facing the Earth reflects light

Waxing

that more of the illuminated half of the Moon can be seen each night

Waning

you see less of its illuminated half each night

Gibbous

more than one quarter is visible

Cresant

you can only see a thin slice of the moon

Solar Eclipse

occurs when the Moon moves directly between the Sun and Earth and casts its shadow over part of Earth

Lunar Eclipse

when Earth's shadow falls on the Moon, a lunar eclipse occurs and a lunar eclipse begins when the Moon moves into Earth' s penumbra

Maria

dark, flat regions

Craters

depressions caused by meteorites, asteroids, and comets striking the Moon's surface

South Pole Aiken Basin

the largest basin in the solar system and it is 2,500 kilometers under ground and 12 kilometers deep.

Impact Basin

When meteorites and other objects strike the Moon, the leave behind depressions in the Moon's surface. The depression left behind by an object striking the Moon is know as an impact basin.

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