history , common misconception and basics of universe

WARNING-EVERYTHING HERE IS EXPLAINED INDIRECTLY AND IN SIMPLE WORDS 

 universe is basically everything which every existed according to the modern physics which works for 4% of the universe.we are a grain of sand compared to the massive universe which keeps expanding for an infinite amount of time .

there are many theories that suggest how universe started , big bang being the most famous and accepted of all .

big bang basically explains that universe started from a tiny tiny point called singularity which violently started expanding and formed what we know and call today as universe . theory explains time when universe was smaller than a molecule and events that took place making it so big . 

big bang also opened gates to further universe studies and opened new gates in cosmology .but a big problem arose .. universe is 13.8 billion years old and but its size is 96 billion light years , other question arose is if universe is so big that light didnt get time to reach from one part of the universe to another than how both the far ends of the universe have same temperature . 

this is when the inflation theory came which solved the doubts somewhat .. the theory called flat universe also explained how universe is ever expanding till time reaches infinity but that van somewhat prove big bang wrong .. if universe expands till time reaches infinity than big bang happened everywhere or it never happened . if u know infinity you also know that infinity is on both the sides on a number line .. lets take an example of a number between 0 and 1 . in case of real number the number after 0 should be 0.00000000000...1 , see what happened there . if i dont add those dots u can never see the number one because number after 0 can be anything .. same happened with universe if itsa going ahead in time till its infinite than going back in time will also be infinite .. so universe could always be there. universe dosent need to expand into anything if its infinite , it can expands into itself .thats the thing about infinity, u never run out of it . 

it is also said that universe expands faster than speed of light and that's the reason why we cant see galaxies which are at the edge of the universe 

those are the things that you should know about universe ...