[Photo Swinging kids by Chan"ad]
So, say you're Pluto.
You've just recovered from what may've been the greatest letdown the scientific community has ever bestowed on any astral being. You're trapped here, like all the "current" planets, due to the force of gravity. The planets have enough mass to interfere with your orbit a smidge, but for all intents and purposes, you're where you are, travelling along the path you do because of the sun.
Like an imaginary rope/chain, you're continually being pulled in towards the sun at a rate equal to (bunch of math here) but maintain your distance because of (more math).
You're in orbit.
If you were a bucket at the end of a rope, swinging in orbit around a 12 year old girl, some of the principles here would be reasonably similar. We "get" how the rope/bucket trick works, and it's a good time watching the bucket go round with no water ever spilling out.
Cut the rope though, and the bucket immediately flies away in a straight path, there being no present force any longer pulling it towards the girl. Cut the rope, kindnap the girl, loosen the knot, etc.. It doesn't really matter.. Once that force is removed, the orbit stops, and the object's momentum takes it off into the distance.
Back to you, Pluto.
If the sun were to explode, or otherwise lose its mass in some significant event, Pluto would hopelessly fly off into the nothingness of space. /wave Take care!
My question to you, is this:
How long does it take you to notice? It takes light 320ish minutes to reach Pluto. Would you feel the loss of gravity 6 hours before you saw the explosion/event? Is gravity across that distance, instant? Or delayed? And if it's delayed, what keeps pulling Pluto in towards the sun for those 6 hours while the Sun -isn't- any longer?