nice
okay heres my thoughts: it should have at least a small bit of glare, and the light emitted doesent seem to affect the nearby stars apropriately, perhaps a colour change in the halo is also in order, also the fact that its perfectly consistant and spherical with nothing else (like solar flares or inconsistent spots) is also odd, plus theres no nearby debris or planets or meteors or anything so it just seems out of place.
though it is a very nice peice and all in all it deserves at least an eight.