The Secrets Of universe

Gnanamani College Of Engineering

Presented On

By B.Divakar B.E Final Year EEE

The universe is made up of millions of Galaxies.

The universe is made up of millions of Galaxies.

A galaxy is a swarm of billions of stars, clouds and

dust rotating around a central point.

• The Galaxy is 100,000 light-years across, but only a few thousand light-years thick.

• As we start out towards the next step, we see other galaxies like the Milky Way begin to appear. Compared to stars in the Milky Way, galaxies are packed together much more closely, and collisions between galaxies are much more common. The Andromeda Galaxy, the nearest galaxy to the Milky Way, is 2.5 million light-years away and on a collision course for Earth. Don't panic, though, as the collision won't happen for another 3 billion years

• At a size scale not much larger than our last, we see that the galaxies are clumped together. These galaxy clusters typically have hundreds of galaxies and are millions of light years across. Galaxies orbit around the center of their clusters,These groups of galaxy clusters are called superclusters. A supercluster may contain hundreds of thousands of galaxies

Hubble's LawHubble's Law describes the expansion of the universe mathematically:

• Hubble's Law describes the expansion of the Universe mathematically.

V=Hod

,

The Age of the Universe

• Imagine a galaxy which flies out from the big bang at the speed of light, The distance it traveled denoted as

d=vt

How Did The Universe Begins

Big Bang Theory

Steady State Theory

Creation Theory

According to the theory, the Universe was created sometime between 10 billion and 20 billion years ago from a cosmic expansion that continues to spread matter in all directions.

•The universe has always been as it is today

•New matter is always being produced

•The universe is continuously contracting and expanding.

•The universe has always been as it is today

•New matter is always being produced

•The universe is continuously contracting and expanding.

•God created the Heavens and the Earth.

•Adam and Eve

•Religion

How the planets created according to the Theories

• An important necessity for the appearance of life is heavy elements. Since only hydrogen and Helium gas were formed during the big bang

• Stars use light elements like Hydrogen and Helium as their fuel. Like nuclear bombs, they use the power of the atom for energy

• This process is called fission. In a star, the energy comes from converting the light elements into heavier elements. This process is called fusion. All of the material in the universe heavier than Hydrogen and Helium were made by fusion in a star.

Stars

• The heavier elements were made in supernovae, Supernovae are extremely bright and extremely hot

• This is where the heaviest elements in the universe are made.

• All of the material needed to make rocky planets was made in stars, and some of it was made in supernovae. This means that planets couldn't exist until there had been enough time for a star to completely go through its life cycle and become a supernova

Planets

• The material would then be ejected back into space, and would form a new star, possibly with planets. It also means that everything in the world, including you, came from a star. As the astronomer Carl Sagan said, "We are star stuff."

• A bigger planet has been created by collision small rocks and planets

• The Sun and the Earth formed about four and a half billion years ago, when our long-lived astronomer was 37 "Milky Way years" old. A solar system forms relatively quickly, and ours probably took only about 100 million years. The Sun and the planets formed from a cloud of sparse gas in the

The end of the Universe (or) it’s beginning

Looking back over the scales of the universe and seeing humanity's role, unimaginably small in both space and time, one might wonder whether science has painted a bleak, depressing, and hopeless picture for humanity. Some would say so, while others find comfort in the majesty and grandeur of the universe, and the possibilities that the future might bring. For now, the future of humanity in this universe, as chaotic and vast as it is, remains uncertain

Conclusion

Thank you