I'm sure this is a silly question

.... but I was thinking, the other day.

Given that it's canon that particles appear and disappear from the
"quantum foam", all the time, (with a nod to Heisenberg so that they Don't
Really Count), and that gravity is always positive.

What happens to the mass of all those particles?
IOW, pick a point, any point, draw a line in any direction to the edge of
the universe. Along that line there are particles appearing and
disappearing all the time.

So why don't we notice the mass of all those particles?
Is it that they cancel out?
Or that they are only around for so short a time that they don't count?
Or am I missing the point?


--
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= David --- If you use Microsoft products, you will, inevitably, get
= Mitchell --- viruses, so please don't add me to your address book.
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