We live on earth and we know that earth is much smaller when compared to the solar system. Similarly, solar system looks small when compared to the milky way . What if you try to compare milky way when you compared with Space?. Ya, I know it's more difficult. The earth is big, measuring over 7,900 miles in diameter, it’s nothing when compared with the universe. Our Sun is just an average star, just one of billions in the Milky Way Galaxy, and there are countless galaxies in the known universe. These are the 10 insane things you should know about the Universe before someone asks you.

10.) How The Universe Was Formed?

The Universe is all of time and space and its contents. The Universe includes planets, stars, galaxies, the tiny subatomic particles, and all matter and energy. The universe is about 91 billion light-years in diameter at the present time. The size of the whole Universe is not known and may be either finite or infinite. Observations and the development of physical theories have led to inferences about the organization and evolution of the Universe.

The Big Bang theory is the current theory of the evolution of the Universe. The Big Bang theory states that the earliest state of the Universe was extremely hot and dense and that it subsequently expanded. This Theory is totally based on general relativity and on simplifying assumptions such as homogeneity and isotropy of space. A version of the theory with a cosmological constant (Lambda) and cold dark matter, known as the Lambda-CDM model, is the simplest theory that provides a reasonably good amount of various information about the Universe. The Big Bang theory accounts for information such as the correlation between distance and redshift of galaxies, the ratio of the number of hydrogen to helium atoms, and the microwave radiation background.

Video of evolution of Universe:

9.) Why  Does Earth Rotates In Counter-Clockwise Direction?

The earth rotates around its own axis from west to east. As viewed from North Star or polestar Polaris, the earth turns counter-clockwise direction. The North Pole, also known as the Geographic North Pole which is the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface. This point is distinct from the Earth's North Magnetic Pole. The South Pole is the other point where the Earth's axis of rotation intersects its surface, in Antarctica.

8.) Is There Any Solar System Similar To Our's?

Our Solar System looks like an oddball. Of all the 1,200-plus planetary systems found so far, none has had an arrangement of planets like ours. Now, 200 light years away, we found our Solar System’s twin Brother. Astronomers have discovered a star almost identical to our Sun, orbited by a planet just like Jupiter – and they’ve also detected hints the system could harbor small rocky planets in habitable inner orbits. Studying such systems could shed new light on the formation of our own Solar System – and help us determine whether life exists elsewhere in the Universe. But Main thing is, How can we get there?

7.) Do aliens really exist?

Aliens. Extraterrestrials. Space Men. Whatever you call them, sightings have been around since man first gazed into the skies.

Let's start with NASA. Three Days into the Apollo 11 Mission, the crew reported a strange flying object not far from their location. They assumed it was a piece of the detached SIV-B rocket. That is until they received word that it was over 6,000 miles away. To this day, the highly-trained crew and team of NASA scientists have no official explanation for what the object could have been. America. But with everything from increasingly bizarre reportings from increasingly credible sources to basic mathematical probability suggesting the likelihood of alien life

5 Strong signs of existence of Aliens:

6.) What Happens if the sun dies?

All stars die, some more violently than others.
Once our own Sun has consumed all the hydrogen fuel in its core, it too will reach the end of its life. Astronomers estimate this to be a short 7 billion years from now. For a few million years, it will expand into a red giant, puffing away its outer layers. Then it’ll collapse down into a white dwarf and slowly cool down to the background temperature of the Universe.

Eventually, even the universe itself will come to an end as all of the energy in the universe is used up. Everything will be at the same temperature and chemical reactions will cease. No work can be done. No information will flow. Even intelligence, thought, and imagination will stop. Nothing will ever change. By then, perhaps 1000 billion years in the future, there will be nothing left of the universe but darkness, emptiness, and absolute cold.

5.) If Aliens Exist, Are They Trying To Kill Us?

                   Would aliens want to help us or hurt us?

I suppose, in the absence of any actual information about alien species, my entire concept of them is built from movies and TV shows. In those shows, aliens tend to do one of two things: extend a gesture of cosmic friendship and love, or violently abduct/dissect/probe us and vaporize our cities. I always thought the movies that portrayed aliens as senseless killers (Independence Day comes to mind) were not as “realistic” as ones in which the aliens strike some sort of rapport with us humble homo sapiens (think Close Encounters of the Third Kind.)

But that’s movies, and I guess I never really thought one of the world’s top scientific minds would conclude that aliens would indeed try to kill us if they had the chance.

It made me think: is that what humans would do with aliens if we found them? Sure, we’ve destroyed all sorts of terrestrial species (usually without trying) and sure, we destroy our own kind on a regular basis, but I think humanity at large would regard an alien encounter as an opportunity to connect, rather than conquer.

4.) What Would Happen If The Earth Got Sucked Into A Black Hole?

According to the NASA, "A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because the matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars."

 Video of what happens to earth and other stars if they sucked by black hole:

3.) What if there was no gravity?

Before looking at changes in gravity, however, it is helpful to first understand what gravity is. Gravity is an attractive force between any two atoms. Let's say you take two golf balls and place them on a table. There will be an incredibly slight gravitational attraction between the atoms in those two golf balls. If you use two massive pieces of lead and some amazingly precise instruments, you can actually measure an infinitesimal attraction between them. It is only when you get a gigantic number of atoms together, as in the case of the planet Earth, that the force of gravitational attraction is significant. 
The reason why gravity on Earth never changes is because the mass of the Earth never changes. The only way to suddenly change the gravity on Earth would be to change the mass of the planet. A change in mass great enough to result in a change in gravity isn't going to happen anytime soon. 

Could we survive without gravity? 

No one would last long if the planet didn't have gravity. 
If gravity were to suddenly double, It would be almost as bad because everything would be twice as heavy. There would be big problems with anything structural. Houses, bridges, skyscrapers, table legs, support columns and so on are all sized for normal gravity. Most structures would collapse fairly quickly if you doubled the load on them. Trees and plants would have problems. Power lines would have problems. The air pressure would double and that would have a big effect on the weather. 

2.) Are we alone in the universe?

It’s highly unlikely we’re alone in the universe, NASA experts are saying, and we may be close to finding alien life. In fact, it may happen in the next two decades.

NASA held a panel discussion at the agency’s Washington headquarters on Monday, where space experts talked about the search for Earth-like planets that host life. Based on recent advancements in space telescope technology, scientists estimated that in the coming decades we’ll confirm suspicions that we’re not alone.

“I think in the next 20 years we will find out we are not alone in the universe,” NASA astronomer Kevin Hand said in footage filmed at the discussion and posted on YouTube.

1.) where did space ends?

Whether space ever ends is a hard question. There is a limit to the space that we can see, because if there is stuff beyond 15 - 20 billion light years (the age of the Universe) the light from there hasn't reached us yet. So we don't know


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