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? Medea Ariadne Minerva Calliope

Answer 1

The youngest galaxy among the four is likely the irregular galaxy named "Calliope," as irregular galaxies are typically characterized by ongoing star formation and are often considered to be younger than other types of galaxies.