Question

13b - Dark Energy and Matter

What are the latest thoughts and ideas on the role of Dark Matter and Dark Energy in the formation and future of our Universe? (this is part of how galaxies work and Cosmology, our next lesson)

Answer 1

My Thoughts on Dark matter-

In order to figure out something, even in our everyday life, the first thought strikes my mind is "what is the root cause?".In all of these our first thinking is beginning from astronomical objects. I am always trying to understand the creation and formation of our universe so the first thing comes in our mind what is the matter presents in the universe broadly. Recent studies of the dynamics of small satellite galaxies around large galaxies have shown that the luminous part of galaxies must be immersed in a huge halo of nonluminous matter. Recent works tell that cluster of galaxies must harbour dark matter.some research says that if our knowledge of the universe is not completely wrong, then the universe as a whole has contained dark matter.

The pairs motion of galaxies and rotation velocity curves of stars in galaxies also indicate that the universe contains considerable quantities of dark matter. One confusion arises here that this matter in baryonic or non-baryonic form. Although till today no stable non-baryonic particles have been detected.

It is not only matter but Radiation can also be an important constituent of the universe. In the early hot universe, the matter was so dense that one expected to be of blackbody type.

The motion of galaxies indicates large scale distribution of dark matter. According to Hubble's law, the universe is continuously expanding so we are trying to know how this dark matter related to the expansion of the universe.

In those days peoples try to understand something how dark matter interacting with particles and its density, what makes the study of galaxy formation structures depends on type and amount of dark matter.

so, the conclusion which can be derived from the above thoughts that the dark energy is a force which accounts for the expanding universe. According to scientist Hubble's we know the universe is continuously expanding that idea which comes in our mind that dark energy dominant on gravitation.its makes most of the universe while dark matter also plays a dominant role.