If dark matter is invisible, then how do we detect it?

Because dark matter has mass, it does interact with normal matter — including photons (light) — via gravity.

What would we possibly see if we could see the dark matter? - Quora

We don't know if dark matter exists. So why do astronomers keep

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Shining a Light on Dark Matter

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Dark Matter Might Be Ultra-Light Axions, Not Massive WIMPs. New

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Dark matter: An invisible glue that may not even exist

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Theorists propose a new method to probe the beginning of the

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Could massive gravitons be viable dark matter candidates?

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How to See the Invisible: 3 Approaches to Finding Dark Matter

Invisible Blue

Future Screens are Mostly Blue - 99% Invisible

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Opticz All Purpose Invisible Blue UV Blacklight Reactive Security

Nearly 70 Years Later, 'Invisible Man' Is Still Inspiring Visual