What is Dark Matter?

What is Dark Matter?


(Picture of black matter by NASA)Although astronomers cannot see dark matter, they can detect its influence by observing how its gravity bends and distorts light from more-distant objects.

Dark matter is a hypothetical substance that has the following properties: 

Invisible

Dark matter is not visible because it does not absorb, reflect, or emit light. It is also not affected by electricity or magnetism. 

Gravitational effect

Dark matter's existence is inferred from the gravitational effect it has on visible matter. 

Makes up most of the universe

Dark matter is thought to make up about 85% of the mass in the universe, outweighing visible matter roughly six to one. 

Difficult to detect

Dark matter is difficult to detect because it does not interact with ordinary baryonic matter and radiation except through gravity. 


What possibly be black matter Composition of?

Scientists speculate that dark matter could be composed of baryons or non-baryonic particles. Leading candidates include

1) weakly interacting massive particles (WIMPs), 

2)neutralinos, 

3) sterile neutrinos.


When Identified black matter?

Scientists first began to suspect the existence of dark matter in the 1930s. The Bullet Cluster, which is two colliding galaxy clusters, provided the first strong evidence for dark matter in the mid-2000s.

https://youtube.com/shorts/AnjcLLE1OMA?si=xaSF6ZMVgGGO4x4t


Compiled by

Ms Naresh kuwar 




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