The age of the Milky Way galaxy has been estimated to be at least 13 billion years.What is this estimate based on?
A)observations of globular clusters
B)observations of open clusters
C)21-cm radiation from H I regions
D)radiation produced at the centre of the galaxy

Question

Quizplus · Accepted Answer

The estimate of the age of the Milky Way galaxy is based on observations of globular clusters, which are compact groups of stars that orbit the galactic center. By measuring the ages of the oldest stars in these clusters, astronomers can estimate the age of the Milky Way itself.

The Age of the Milky Way Galaxy Has Been Estimated