Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

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


a round, three-dimensional object


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.


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


the spinning of Earth on its axis


Earth's yearly orbit around the Sun


an elongated, closed curve


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


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


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


you see less of its illuminated half each night


more than one quarter is visible


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


dark, flat regions


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.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording