Red giants map how the Milky Way grew

Measuring the mass of 70,000 aging stars reveals older center, younger outskirts

red giant

AGE MAP  The ages of tens of thousands of red giant stars are charted atop a map of the Milky Way. The oldest stars are in red, near the galactic center. The youngest stars are blue.

M. Ness, G. Stinson/MPIA

This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Astronomy

From the Nature Index

Paid Content