Prominences occur on the surface of which astronomical object?

Not too difficult as the picture is of the sun.

INCASE YOU'RE WONDERING: A solar prominence is anchored to the sun; the arch does not separate and go into space. A solar flare, though, will travel through space, since it is a release of energy. A solar prominence can break down and release a solar flare, but that does not always happen.

Mythagoman, My thoughts exactly.

Of course, nobody's proven any of that because it's too hot a job.