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dark matter is not a theory

Angela Collier · explainer · Watch on YouTube

Cosmology & astrophysicsScientific method & science communication

What it is

Physicist Angela Collier argues that dark matter is not a theory but a set of observations, covering rotation curves, the CMB and why modified gravity struggles to explain them.

Why Hacker News recommends it

HN links it to correct the common misconception about dark matter and as a counterpoint to popular science coverage, though one commenter found it muddled.

  • 5 people recommended it
  • 4 different months
  • 1 strong recommendations
  • first 2023, last 2024

What HN commenters said

  1. “This is a dense video, I highly recommend it though”

    Dense evidence for dark matter over modified gravity.

    badosu, 2023-12 · Strong recommendation · in “Astronomers posit that we live in a giant void”

  2. “dark matter is not a theory, it's a set of observations.”

    Explains dark matter as a set of observations rather than a theory.

    Pxtl, 2023-10 · Recommendation · in “Revisited mass of the Milky Way is much smaller than expectations from cosmology”

  3. “If you're interested in learning more I recommend you watch "dark matter is not a theory”

    Explains consistent observed excess mass effects.

    aeturnum, 2023-10 · Recommendation · in “Revisited mass of the Milky Way is much smaller than expectations from cosmology”

  4. “I really enjoyed Dr Angela's videos on Dark Matter [1,2]”

    Videos clarifying dark matter as observations.

    PartiallyTyped, 2024-06 · Recommendation · in “Gravity Without Mass: UAH Study Proposes Alternative to Dark Matter”

  5. “these YouTube videos are a nice counterpoint to a lot of popular communication and discussion on dark matter”

    Nice counterpoint to popular discussion of dark matter.

    bunderbunder, 2024-08 · Recommendation · in “The possibilities for dark matter have shrunk”

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

Topics: dark matter, rotation curves, modified gravity, cosmology, angela collier

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