Science Questions

Sat, 15th Jul 2006

Part of the show Sun Tans, Fission and Fusion

Question

Scott in the USA asked:

Generally speaking, is the Sun really shrinking at a speed people should be worried about?

Answer

It's certainly shrinking because it's giving off matter into space all the time. It's known as the solar wind. But this is a tiny fraction of the mass of the Sun and it's certainly not going to evaporate off into space before it's used up all the fuel. One statistic I did hear is that it sheds one million tonnes per second. The numbers are so big that it's difficult to equate what they are, but it's the equivalent of the mass of a reasonable sized mountain per day.

Multimedia

Subscribe Free

Related Content

Not working please enable javascript
EPSRC
Powered by UKfast
STFC
Genetics Society
ipDTL