Space Dictionary

A simple and easy-to-understand dictionary of space, astronomy, and cosmic exploration terms for students, enthusiasts, and curious minds.

Galaxy and stars in deep space

What is Space Dictionary?

Space Dictionary is a knowledge resource designed to explain astronomy and space-related terms in a clear and simple way. From planets and stars to galaxies and black holes, we help you understand the universe one word at a time.

Whether you are learning about space for education, research, or personal interest, this dictionary provides short and accurate definitions that make complex concepts easier to grasp.

Galaxy

A massive system of stars, gas, dust, and dark matter held together by gravity, such as the Milky Way.

Black Hole

A region in space with extremely strong gravity where nothing, not even light, can escape.

Exoplanet

A planet that orbits a star outside our solar system.

Nebula

A cloud of gas and dust in space, often the birthplace of new stars.