The Solar System and Beyond

Earth spinning around its axis.

Earth moves around the Sun in a regular, curved path called this.

The movement of Earth around the Sun.

Mountainous areas of the Moon

smooth, dark regions on the Moon that formed when lava flowed onto the Moon's surface.

event that occurs when the Moon moves between the Sun and Earth or when Earth moves between the Sun and th Moon and casts a shadow.

alternate rise and fall of sea level caused by the gravitational attractions of the Moon and Sun.

a unit of measure equal to the distance from Earth to the Sun or about 150 million km

large body of ice and rock that orbits the Sun; a comet develops a bright, glowing tail as it nears the Sun.

Any rock from space that survives its plunge through the atmosphere and lands on Earth's surface.

The nine planets and numerous other objects that orbit the Sun, all held in place by the Sun's gravity.

group of stars that forms a pattern in the sky.

group of stars, gas, and dust held together by gravity.

About 9.5 trillion km -- the distance that light travvels in one year.

Very bright explosion of a supergiant that takes places after its core collapses.