I think it might be possible but I think it'd get complicated quickly and be extremely inefficient. There's no "gravitational attraction" button if that's what you're looking for.
Attracting to a single actor wouldn't be too hard and is something I've been thinking of doing (ala that Mario game where he jumps between planets) but I haven't gotten around to it. But a bunch of actors attracting to each other... I dunno.
quick note to those trying to use this method with moving objects, havent yet gotten the sufficient force needed to allow the object to follow another object for example a planet attracting astroids when the planet is in orbit, now this will work when focused on a non moving area such as the sun
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Attracting to a single actor wouldn't be too hard and is something I've been thinking of doing (ala that Mario game where he jumps between planets) but I haven't gotten around to it. But a bunch of actors attracting to each other... I dunno.
misile1 and enemies called enemy1 2 3 etc