What is dark matter?


Psysics Girl explains us what dark matter is and how they could know suck a thing really exists. Dark matter seems to be composed on wimp – weakly interacting massive particles and it does not interact with electromagnetic radiation. You only know it is there because it causes a gravitational pull on things.

The scientists were able to detect dark matter because:
– galaxies’ mass is way more than all the mass we can see an calculate
– stars that are farther away from Galaxies core should rotate slower in the orbit
– light should bend only when it comes near a galaxy, but there are also some area where light bends even though you do not see anything in there.

This is why the researchers concluded that there should be some kind of matter that exerts some gravitational pull on objects.

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