Space

The time required for Earth to rotate once on its axis.

The time required for the Earth to orbit once around the sun.

Because the Moon rotates and revolves in nearly the same amount of time (~29days), the same side of the Moon always faces Earth

The progression of changes in the moon's appearance during the month.

Smaller objects that orbit a planet.

Rocky metallic objects that orbit the sun but are too small to be considered planets.

Large clumps of ice, dust and frozen gases that travel around the Sun in long elliptical orbits.

An object that burns and vaporizes upon entry into the Earth's atmosphere.

A meteor that has hit earth's surface.

Collect light from distant stars and separate that light into bands of different colors.

An imaginary line that passes through Earth's center and the North and South poles, about which Earth rotates.

Earth has seasons because because its axis is tilted as it moves around the sun.

The movement of an object around another object.

Telescopes or other instruments that have been launched into outer space to collect data on distant planets, galaxies, and other celestial bodies.

Neap tides are especially weak tides. Spring Tide is a rare, unusually high tide.