says...

I think I understand. Correct me if I'm wrong: The law that says that
objects can't move faster than light only applies when you are in an
inertial frame, i.e. a frame that is not experiencing acceleration.
When you are in an accelerating frame, things CAN go faster than
light.

Just for clarification: nothing ever goes faster than a light
signal (at least not through vacuum), but things can go faster
than 300,000,000 meters per second in an inertial frame (and
so can light).

So, for example, we on earth will correctly measure certain
photons to be traveling faster than light, since we are in an
accelerating frame. Is that true?

I would rephrase this as follows: We can measure some photons to
be traveling at a different speed than 300,000,000 meters per second.
Near the surface of the Earth, photons travel radially outward
at a slightly slower speed than this. As you get farther from
the Earth, the radial speed of a photon increases, but it doesn't
keep increasing without bound (unlike the accelerating rocket
case).

--
Daryl McCullough
Ithaca, NY