[john in missouri]

Sound like "its gravity will cause the quasar's apparent position in the sky to shift by a distance that depends on the speed of gravity" would be a more fair statement.

[RightWhale]

Just wondering if this is the same idea as the measurement of the speed of light done a long time ago by observing and timing the orbits of Jupiter's moons.

[ArGee]

Sound like "its gravity will cause the quasar's apparent position in the sky to shift by a distance that depends on the speed of gravity" would be a more fair statement.

I would posit that it's apparent position in the sky and its position in the sky are the same thing, since "in the sky" is only a particular reference frame based on a particular observation point - that of within earth's atmosphere.

Why do work when I can sit around picking at nits? ;)

Shalom.