Hirunews Logo
Sun+Has+Entered+Middle+Age%3B+Likely+a+New+Evolutionary+Phase%2C+Say+Astronomers
Friday, 01 July 2016 - 8:32
Sun Has Entered Middle Age; Likely a New Evolutionary Phase, Say Astronomers
430

Shares
51,704

Views
The Sun—at about 4.5 billion years old—is now entering its middle-age phase.

Astronomers believe the Sun has entered a new phase in its evolution as a hydrogen-burning star, according to a new paper submitted to The Astrophysical Journal Letters. The new phase leads to believe that the star's sunspot cycles are likely to slowly disappear over the next hundred million years.

"The Sun's 11-year sunspot cycle is likely to disappear entirely, not just get less pronounced; since other start with similar rotation rates show no sunspot cycles," Travis Metcalfe, the paper's lead author, has told Forbes magazine.

The full transition into "middle-age" will take a few million years, but once it's evolved, the Sun will remain magnetically inactive for the rest of its life.

Make a Comment
Make a Comment

DOWNLOAD HIRUNEWS APP ON ANDROID & APPLE
News Image
Hiru News Programme Segments
176 Views
1,701 Views
1,705 Views
38,983 Views
1,941 Views
40,169 Views
Top