Our Universe and the Way We see It Today

What is the Universe if not totality of all existing things - the profound word that covers almost everything around us. Scientists believe that they know what happened during that tiny fraction of a second when everything was created out of “mysterious nothing”, size of one trillionth of a pinhead. Was all existing matter produced out of the excess of Big Bang released energy? When the energy produced by the initial explosion cooled, subatomic particles were formed. Matter and antimatter were created simultaneously but when they met, they annihilated each other violently. Following second wave of explosions left almost no antimatter in existence, but a small residue of matter which formed the Universe as we see it today.

About the Expansion Process

After matter and antimatter finished annihilating each other, the Universe started cooling. Hydrogen and helium was all the Universe consisted of for a while. Slowly, the gravity kicked in, and galaxies began to collapse. The Universe started looking more the way we see it today.

Whatare We Expanding Into?

On very large scale the Universe looks evenly spread out, galaxies distributed proportionally. 13,7 billion years later everything appears to be moving away from us forming more and more space-time. So what is the universe expanding into? Into what do the edges go? Are there any edges?

How Far Can We See?

In 2009, the European Space Agency released the results of sky-scan using highly sensitive detectors performed by the Planck telescope. The telescope is able to measure the variations in temperature to within one part in a million. Using this technology scientists were able to see the Universe when it was only few hundred thousand years old.

From the Solar System to Galaxies

The vastness of the Universe is incomprehensible to our minds. Distances that cannot even be imagined separate us from closest galactics. We live in a big place!

Sizes of Celestial Objects

How big are the objects in our universe, and what is the maximum size a star can grow? For now, VY Canis Majoris is the biggest know star discovered.

Sun and Stars

This ball of superheated gas million miles in diameter has been keeping the inhabitants of the earth warm for a while now, but it looks ridiculously small in comparison with stars billions of times larger in size.

Solar system

But let us stay closer to home for a minute. There is so much to do in our local Solar System.

The Earth Evolved

Despite being such a hospitable place our home planet had suffered some violent events. Today however, we are enjoying its prime times, but let us see how it all happened.

Could The Universe be Explained by the Quantum Gravity Theory

There are many theories trying to explain our Universe but every one of them works only on its individual narrow scale. Quantum mechanics and general relativity proved to be incompatible. Which theory is able to explain the Universe we live in? As we extend our reach into deep space the need for the unified theory raises high, while everything we have so far seems to be an approximation to the laws governing the universe. How can we make quantum mechanics and gravity live together?Many believe that in order to understand our universe we need to understand what quantum gravity is.

References: National Geographic, Tony Darnell, Michio Kaku, ESA, European Space Agency, ESA-Planck Team, BBC Two.