# Is it possible that there are stars working on fission?

Most/all stars are getting their energy from fusion of small atoms like our sun. But is it possible according to the laws of physics that there are stars getting their energy from fission fe with uranium atoms?

• ...and where are the stars supposed to have gotten that uranium from? – ACuriousMind May 30 '16 at 13:32
• from supernova's? – Marijn May 30 '16 at 13:33
• @Marijn: supernovas produce only a little of the heavy elements like $U$, which is strongly diluted with lighter, non-fissionable material. A star would never reach the required $U-235$ levels for sustainable fission to occur. – Gert May 30 '16 at 14:11