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
432

Shares
51,929

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
Heavy snow across the globe
Friday, 13 January 2017 - 9:29
Many countries are experiencing heavy snow, foreign media states. The temperature in England, Scotland, North Ireland and Wales has hit minus 10 degrees... Read More
News Image
Hiru News Programme Segments
340 Views
767 Views
2,239 Views
1,563 Views
9,665 Views
44,380 Views
Top