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Animation of null geodesics emitted from a source in the corner of a square. On the left, we see these geodesics propagate outward in the flat Minkowski spacetime. On the right we see them deflected by the gravitational field around a large, static mass confined to its Schwarzschild radius.

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Animation of null geodesics emitted from a source in the corner of a square. On the left, we see these geodesics propagate outward in the flat Minkowski spacetime. On the right we see them deflected by the gravitational field around a large, static mass confined to its Schwarzschild radius.

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Robert McNees (mcnees@mastodon.social)'s status on Monday, 13-Nov-2023 15:16:17 UTC Robert McNees
in reply to

It's a simple idea: The round-trip time of a radio signal bounced off a distant object increases a little if it passes through the gravitational field of a massive object along the way.
Image: Simon Tyran, https://en.wikipedia.org/wiki/File:Shapiro_delay.gif

In conversation about a year ago from mastodon.social permalink