When is a star a star?
Hi Guys
Jupiter is often called a failed star since it has never been heavy enough to light up proton-proton reactions and get on the Main Sequence. But Jupiter might still be a fusion-powered object...
http://au.arxiv.org/abs/physics/0112018
http://ast.star.rl.ac.uk/symp202/posters/ouyed.html
...Jupiter might be burning deuterium deep down in its guts. So when is a fusion-powered astronomical object not a star?
Adam