Astronomy Vocabulary

What is astronomy?

• one complete trip around the sun

• the study of the universe

• a group of star clusters held together by gravity

• our home galaxy

The axis is _________

• a vertical belt, about 15 degrees wide in longitude, in which all locations have the same time.

• one complete trip around the sun

• a line at a longitude of 180 degrees

• an imaginary line that runs from the North Pole to the South Pole through the center of Earth.

The revolution is _________

• one complete trip around the Sun

• one complete spin of Earth on its axis

The rotation is _________

• one complete trip around the Sun

• once complete spin of Earth on its axis

What is the definition of universe?

• the study of the universe

• a device that collects light and magnifies images

• It consists of Earth, the planets, the stars, and all of space

• a line at a longitude of 180 degrees

The phase of the Moon is _________

• the shape of the Moon we see in the night sky

• an event that occurs when Earth blocks sunlight from reaching the Moon

• an event that occurs when Earth passes through the Moon's shadow

• the large, dark, flat surface areas on the Moon's surface

What is Gravity

• the shape of the Moon we see in the night sky

• the regular rise and fall of the water level along the shore

• the force of attraction among all objects

• the large, dark, flat surface areas on the Moon's surface

What is a large body the orbits a star?

• comet

• moon

• meteorite

• planet

What is a large object that orbits a planet

• sun

• moon

• comet

• inertia

A large, hot ball of gases, held together by gravity, that gives off its own light

• black hole

• supernova

• star

• nebula