Irregular galaxies are different than Spiral and Elliptical galaxies in that they do not have a distinct shape do not have an age do not have stars do not exist

## Step 1<br />The problem is asking us to identify the characteristic that sets irregular galaxies apart from spiral and elliptical galaxies. <br /><br />## Step 2<br />Spiral galaxies are known for their spiral arms, while elliptical galaxies are known for their elliptical shape. <br /><br />## Step 3<br />Irregular galaxies, on the other hand, do not have a distinct shape. They do not fit into the spiral or elliptical categories because they lack a clear structure. <br /><br />## Step 4<br />The other options, such as an age, not having stars, or not existing, are incorrect. All galaxies, including irregular ones, have stars and an age. They also exist.