Answer» Correct Answer - Option 4 : A
The correct answer is Regulars. - Irregular galaxies have no regular or symmetrical structure. They are divided into two groups, Irr I and IrrII.
- Irr I type galaxies have HII regions, which are regions of elemental hydrogen gas, and many Population I stars, which are young hot stars.18-Apr-2000
- Astronomers classify galaxies into three major categories: elliptical, spiral, and irregular.
- These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.
- Elliptical galaxies, such as M87, are the oldest and roundest galaxies in the universe.
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