2
votes
1answer
37 views

Can some amount of gravity be caused by virtual particles?

On the scale of a galaxy, can vacuum-based pairs of virtual particles be noticed gravitationally? Even though they are short-lived, shouldn't their mass and numbers be enough to be measured/felt?
1
vote
1answer
47 views

Virtual Gravitons?

In QED, the field strength dependence is expressed by a field of virtual photons of varying spatial density. I know that we describe gravity as a warp in space-time, but how can one warp space (and ...
3
votes
2answers
126 views

Are gravitons bound by the event horizon?

I understand that photons, even when traveling at the speed of light, cannot escape the event horizon of a black hole. Are gravitons and other virtual particles traveling at the speed of light also ...
2
votes
1answer
94 views

Time taken for gravity of a distant object to interact with a newly created particle? [duplicate]

Possible Duplicate: The speed of gravity Does gravity travel at the speed of light? Imagine there is a large mass $m_1$ (e.g. a star) 1 light-year away from us. It is stable, stationary ...