Robert is looking at four galaxies:

an irregular galaxy the he calls “Calliope”;

a spiral galaxy that he calls “Medea”;

an elliptical galaxy that he calls “Minerva”;

and a lenticular galaxy that he calls “Ariadne”;

Which of these four is the youngest?

(1 point)
Responses

Medea

Medea

Ariadne

Ariadne

Minerva

Minerva

Calliope

1 answer

Among the types of galaxies listed, irregular galaxies, such as "Calliope," are generally considered to be the youngest. They are often in the process of forming new stars and have not yet settled into a distinct shape like spiral or elliptical galaxies. Therefore, the youngest galaxy among the four is likely Calliope.