Is the sun the hottest thing in the universe?

What do curling irons, campfires, and cups of hot cocoa have in common?  They’re all hot!  But nothing is as hot as the sun – at least not in our solar system!  But what about the rest of the universe?  Is the sun the hottest thing? We asked astronomer Mark Popinchalk to help us find the answer.

Got a question that’s too hot to handle?   Send it to us at BrainsOn.org/contact, and we’ll find an explanation that shines!