How do astronomers know the age of the planets and stars?

Measuring the ages of planets and stars is tricky. An observational astrophysicist describes the subtle clues that provide good estimates for how old different space objects are.

How do astronomers know the age of the planets and stars?

Goldilocks Stars Are Best Places to Look for Life - NASA Science

upload.wikimedia.org/wikipedia/commons/1/19/Solar_

History of astronomy - Wikipedia

Stars – information, recherche et analyse – The Conversation France, page 1

CANADA: Toronto Blue Jays on the cusp of locking down a wild-card

Why isn't there any sound in space? An astronomer explains why in

An 8th Planet Is Found Orbiting a Distant Star, With A.I.'s Help

Against All Odds: Earth-Like Planets Can Emerge Even In Extremely Harsh Conditions

What is an astronomical unit?

Joe Landon on LinkedIn: 9 alien planet discoveries that were out-of-this-world in 2022