Movement in Space
An object that orbits the sun, is large enough to have become rounded by its own gravity and has cleared the area of its orbit of any debris
What is a planet?
The spinning of Earth on its axis
What is rotation?
The different shapes of the moon
What is a phase?
A pattern or groups of stars that people imagine represent a figure, animal, or object
What is a constellation?
The movement of one object around another
What is revolution?
The partial or total blocking of light of one celestial object by another
What is an eclipse?
Based on the belief that the sun is the center of the universe
What is heliocentric?
An imaginary line that passes from the North Pole, through the Earth's center, to the South Pole
What is an axis?
The moon phase during a solar eclipse
What is new moon?
A model of the universe in which Earth is at the center of the revolving planets and stars.
What is geocentric?
The length of time is takes for Earth to rotate
What is 24 hours?
The moon phase during a lunar eclipse
What is full moon?
The two gases in a star
What is hydrogen and helium?
The reason we have seasons
What is Earth's tilt?
The length of time it takes for the moon to go through all of its phases
What is 29.5 days?