A shape that is like a circle stretched out in opposite directions.
Spinning of a planet, moon, or star around its axis.
Event in which one object in space gets between the sun and another object.
Movement of one object around another.
Event in which the moon passes through Earth's shadow.
Path an object follows as it revoloves around another object.
Event in which the moon passes between the Sun and Earth.
The government agency that run the U.S. space program.