What? How can universe be a part of earth. See the earth is a planet in the solar system. The solar system is the part of our galaxy whose name is Milky way. Now like us there are many other galaxies which consists planets and stars and black holes etc. The collection of all this galaxies in the space is called the Universe.

So Earth is a part of the galaxy present in the universe.

I don't understand what you want to ask. It would be better for you to repost the question with proper question specifics so that we can provide you all the information required.

Have a great day!

In the above equation, E is the total energy of the particle, p is the momentum of the particle (which is related to its motion), c is the speed of light, and m is the mass of the particle. This equation can be derived from the relativistic definitions of the energy and momentum of a particle. The above equation tells us that the total energy of a particle is a combination of its mass energy and its momentum energy (which is not necessarily related to its mass). When a particle is at rest (p = 0), this general equation reduces down to the familiar E = mc2. In contrast, for a particle with no mass (m = 0), the general equation reduces down to E = pc. Since photons (particles of light) have no mass, they must obey E = pc and therefore get all of their energy from their momentum.