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Galaxy

UK //ˈɡæləksi//US //ˈɡæləksi//

Definition

A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.

In simple words: A large group of stars and space objects.

Examples

The Milky Way is the galaxy we live in.
Astronomers have discovered a new galaxy far from Earth.
Many science fiction movies explore life in other galaxies.
The Andromeda galaxy is the nearest large galaxy to the Milky Way.
Looking up at the night sky, you can see our galaxy's center shining brightly.

Usage notes

Used primarily in scientific contexts. Can denote a vast collection of stars, but also used metaphorically in popular culture.

Grammar pattern

standalone noun

Memory hint

Think of a 'galaxy' as a 'gal' with lots of 'lax' stars.

Collocations

spiral galaxy
elliptical galaxy
distant galaxy
galaxy formation
galaxy cluster

Synonyms

star system
stellar system
cosmic structure
galactic cluster
celestial body

Common mistakes

Confused with 'universe' - a galaxy is smaller than the universe.
Mispronunciation of 'galaxy' - make sure to emphasize the second syllable.
Using 'galaxy' in singular rather than plural when discussing multiple groups.