DARK MATTER

SUBMITTTED BY: 2011-MM-69 Waqas Inam

SUBMITTED TO: Sir Rauf Akhtar

What is Dark Matter? The matter which neither emits nor

absorbs light or other radiations and the only way to identify it is its gravitational effects on galaxies, stars etc. Therefore,

Dark matter can not be seen with telescope. Its constituent subatomic

particle is unknown yet.

Why is it important to know about it?

Our Universe’s energy comprises of; • 73% Dark energy • 23% Dark matter • 4% Regular matter, like stars, planets, and everything else.

Supposition Before Planck: • Dark matter 22.7% • Dark energy 72.8% • Ordinary matter 4.5%

After Planck Observation: • Dark matter 26.8% • Dark energy 68.3% • Ordinary matter 4.9%

The Proof of Existence of Dark Matter Dark matter came to the attention of

astrophysicists due to difference between the mass of large astronomical objects

determined from their gravitational effects, and the mass calculated from the

"luminous matter" they contain: stars, gas and dust.

That’s all

THANK YOU