View Full Version : How to Tell the Age of a Sun-like Star? Try ‘Gyrochronology’

2014-Jul-11, 01:51 PM
There’s no doubt the term “Earth-like” is a bit of a misnomer. It requires only that a planet is both Earth-size (less than 1.25 times Earth’s girth and less than twice Earth’s mass) and circles its host star within the habitable zone. But defining a “Sun-like” star may be just as difficult. A solar twin […]

More... (http://www.universetoday.com/113146/how-to-tell-the-age-of-a-sun-like-star-try-gyrochronology/)