All irregular galaxy synonyms
ir·reg·u·lar gal·ax·y
I i noun irregular galaxy
- spiral galaxy — a galaxy having a spiral structure.
- milky way — the spiral galaxy containing our solar system. With the naked eye it is observed as a faint luminous band stretching across the heavens, composed of approximately a trillion stars, most of which are too distant to be seen individually.
- island universe — an external galaxy.
- star cluster — a number of stars of common origin held together as a group by gravitational attraction. Compare globular cluster, open cluster, stellar association.
- star system — the practice of casting and promoting star performers for their ability to draw at the box office.