Question

God morning ..is anyone online from my friends list
Explain Dark matter..
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Answer 1

Answer:

good morning have a nice day never be sad

Explanation:

Dark matter can refer to any substance which interacts predominantly via gravity with visible matter (e.g., stars and planets). Hence in principle it need not be composed of a new type of fundamental particle but could, at least in part, be made up of standard baryonic matter, such as protons or neutrons.

Answer 2

Answer:

Hey dear. Good morning. Wishing you a great day ahead. :)

Explanation:

Coming to your question,

1. WHAT IS IT ?

• Dark matter in simple terms is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation.
• We cannot see it directly. However we are aware of its presence because of the effects it has on other things.

2. WHAT IS IT MADE OF ?

• Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.

3. EVIDENCE OF EXISTENCE

• Primary evidence for dark matter comes from calculations showing that many galaxies would fly apart, or that they would not have formed or would not move as they do, if they did not contain a large amount of unseen matter.
• Other lines of evidence include observations in gravitational lensing.
• Other evidences are cosmic microwave background, along with astronomical observations of the observable universe's current structure, the formation and evolution of galaxies, mass location during galactic collisions,and the motion of galaxies within galaxy clusters.

I am attaching a picture of dark matter for you ready reference. Although that's not real, but it's hypothesised.

Hope it helps!

:)