A black hole is a region of spacetime, or it's okay to think of it as at each time it's a region of space. There's a boundary around it, the event horizon. We're trying to get better at figuring out exactly how to localize gravitational wave signals on the sky. As a gravitational wave passes by, it will intersect the different detectors at different times.
Welcome to the October 2022 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy!
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