axis
An imaginary line that passes through the North Pole, the center, and the South Pole of the Earth
rotation
the spinning of Earth around its axis-causes day & night
revolution
The movement of one object around another, such as Earth revolving around the Sun
orbit
The path an object travels, such as Earth's path as it revolves around the Sun
ellipse
an oval-shaped curve that is like a circle stretched out in opposite directions
lunar eclipse
when Earth is between the Sun and the Moon, and the Moon passes through Earth's shadow
solar eclipse
When the Moon passes between the Sun and Earth, and casts its shadow on Earth
constellation
any one of 88 areas in the sky that are used to identify and name the stars
eclipse
when one object in space gets between the Sun and another object and casts its shadow on another object