January 6, 2015 | Rohan

To me there's nothing better than gazing up at the stars on a clear night. I often wonder how old they all are. Now astronomers have found a way to accurately measure a star's age.

They do this by looking at how fast a star spins. Like anything set in motion, the longer you leave it, the slower it gets. Stars appear quite featureless from a distance, so to see how fast they spin astronomers had to look for telltale sunspots on their surfaces.

News

84 Likes | No comments

Do you like this story?

Poll

How do you feel about astronomy?




Sun

The Kepler space telescope took detailed images of 30 stars so experts could create their 'star clock'.

Enlarge

Image: NASA

Share your comment

Write as if you were talking to a friend (and maybe in front of your mother!).

Keep it classy, keep it clean and keep your temper.

Comments may be displayed in the gallery as well as on the website - check out our Community Guidelines for more info.

Tags

Popular Posts