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How to Detect Extra Dimensions

PBS Space Time · explainer · Watch on YouTube

Cosmology & astrophysicsFundamental physics

What it is

A PBS Space Time episode on how gravitational wave observations of a neutron star merger, GW170817, can limit the number of spacetime dimensions. It is based on a 2018 paper.

Why Hacker News recommends it

HN points to it as a clear explanation of the evidence that gravity does not propagate into extra dimensions.

  • 3 people recommended it
  • 1 different months
  • 0 strong recommendations
  • first 2018, last 2020

What HN commenters said

  1. “There was an interesting PBS space time video about one example recently”

    PBS Space Time on testing extra dimensions of gravity

    dwaltrip, 2018-10 · Recommendation · in “The Reason We Haven’t Directly Detected Dark Matter”

  2. “Youtube video that explains this in depth”

    In-depth explanation of gravity and dimensions

    stephengillie, 2018-10 · Recommendation · in “The Reason We Haven’t Directly Detected Dark Matter”

  3. “explained well by this PBS Space Time episode [1]”

    Evidence against gravity propagating in extra spatial dimensions

    Twisol, 2018-10 · Recommendation · in “Mathematicians confirm the possibility of data transfer via gravitational waves”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: gravitational waves, gw170817, cosmology, pbs space time, general relativity

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