Earth
This keeps the Earth and moon in their orbits.
What is "gravity"?
It takes this long for the Earth to complete on full rotation.
What is 24 hours?
The rotation of the Earth causes this phenomena
What is a "day and night"?
Which of the Sun, Moon, and Earth, does not have an atmosphere?
What is "the moon"
Which of the Sun, Moon, and Earth has craters?
What is "Both the Earth and Moon"