On 18/09/2015 10:59, Stephen Wolstenholme wrote:
One of my young carers came in when I was looking at the picture at
http://apod.nasa.gov/apod/ap150917.html

She asked what it was and I replied that it was the result of a star
exploding. She replied that it was lucky there are no stars near us. I
pointed at the Sun. Now she is worried about it exploding.

It isn't heavy enough to do that. It will eventually expand to a red
giant and cook the Earth but she'll have to wait about 4bn years...

--
Regards,
Martin Brown