Brief Introduction To Universe

One of the questions that man had been pondering since it's got use of memory refers to the world that surrounds it.

The more knowledge it gets, the more this world starts expanding and taking a bit of sense, but there's always a blank space, What's out there?

Therefore, Astronomy plays a great role here, starting by analyzing and studying all what is inside universe.

Leaving aside Philosophy, lets explain, What is Universe?

"Universe is everything surrounding us, with no exception"

Matter, Antimatter, Energy, Space & Time,  absolutely everything that exists forms part of it.

 

Universe contains galaxies, comets, asteroids, nebulae, white dwarfs, galaxy clusters, superclusters and even more; besides almost, infinite matter.
Even with all "Today's Technology", we still unknowing the exact size of Universe, even though those uncountable researches and proposed equations.
As referring to matter, this is not uniformly distributed, instead, its concentrated in concrete places: Galaxies, Systems, Stars, Planets. Yet, around 95% of Universe is non-visible dark matter.

Some of the most abundant elements in Universe are:

Symbol	Element Name	Percentage
H	Hydrogen	75%
He	Helium	24%
O	Oxygen	0.085%
C	Carbon	0.036%
N	Nitrogen	0.0112%
Ne	Neon	0.0110%
Fe	Iron	0.0033%
SI	Silicon	0.0031%
Mg	Magnesium	0.0030%
S	Sulfur	0.0018%

Big Bang's Theory and its relation with actual Universe.

Modern science considers big bang as the closest theory to he formation of universe; this theory states that 13,700 million years ago, matter used to have almost infinite density and temperature, estimating density at 1x10 ^72 g/cm3.
Due to this conditions, a massive and violent explosion took place, creating what we know and, hence, universe started loosing density and temperature, keeping a process of expansion.
Since everything is better described with a picture...

Universe had always been a mystery, in fact it stills being a mystery, we can say that all what we know is just 1 atom of it. Since mythological and religious explanations from past, to the modern research stuff available to scientists and astronomers, taking into account that science had evolved exponentially on the last 100 years.
There are lots of things to discover, but inside this matter of universe studying, we're nothing but just little ants trying to explore the outer world outside its ant hill.
By now, we only have left to evolve our minds, since there are some concepts that for human understanding will be absolutely incomprehensible.

 

Later Travelers.