skyjedi2005 said:

JJ Abrams traveled back in time and added a lens flare?

Or just more Lucash wankery and tweaking of the image with computers.

This is in every version. I always thought it was a just a special effects mistake.

Maybe as they were recording the falcon minature they caught something at the edge of the frame, then when they spliced it onto the asteroid background it carried over.

It looks like a small moon inside the asteroid.

of course it might not be a moon...

it could be a space station.