Astronomy Vocabulary

It is all of space and time. It is everything we can touch, feel, sense, measure or detect. It includes living things, planets, stars, dust clouds, light, and even time.

It is the collection of eight planets and their moons in orbit round the sun.

This is the scientific study of the universe. It is the study of the sun, moon, stars, planets, comets, gas, galaxies, gas, dust and other non-Earthly bodies.

It is a system of millions or billions of stars, together with gas and dust. It is held together by gravity.

This often simply means "universe". The universe considered as a system with an order and pattern.

It is an object or a celestial body that orbits the sun.

This is a scientist who studies the stars , planets , and other natural objects in the universe.

It is the galaxy that contains our solar system. All the stars we see in the night sky are in this galaxy.

Fine particles of matter. Dry powder consisting of tiny particles of earth.

This is a small body moving in the solar system.

This is a large, irregularly shaped object in space that orbits our Sun.

A person who travels beyond the earth's atmosphere, travels in outer space.

It is a very large ball of burning gas in space. It is a bright point of light in the sky.

It is an optical instrument. You can observe the stars or planets with it.

It is a cloud of gas and dust in outer space.

It is a vehicle in which astronauts can travel round the earth, outside its atmosphere, doing scientific tests.