WHAT IS UNIVERSE?|BIRTH OF UNIVERSE.

 

                                                        🌀AP3 TeCH🌀

• What exactly is the Universe?

                The Universe consists of all that exists, including planets, 

stars, galaxies, and the space between them. Even time is a 

component of the Universe. Nobody knows how large the  Universe 

is or where it begins or finishes. Everything is so far away from our 

tiny world that light from stars and galaxies will take billions of 

years to reach us, so we see the Universe as it was billions of years 

ago.

                     

• THE FUTURE UNIVERSE. 

             Over many years, scientists thought that the gravitational 

force of stars and galaxies will eventually slow the expansion of the 

Universe Recent findings, however, indicate that this expansion is 

accelerating. If this is so, the galaxies will become increasingly 

distant. There will be no more stars, no more black holes, and the 

Universe will end as a cold, dark place, lifeless, and empty place.

•  Measuring distances

     Distance measurement in the Universe is difficult. 

Many galaxies are so far away that the only thing we can 

use to communicate with them is light. The wavelengths 

of light from an object become extended as the Universe 

expands and stretches space. Any dark lines in its 

spectrum change towards the red end, causing 

astronomers to refer to this as a "redshift."Astronomers 

can measure the distances of galaxies and how fast they 

are moving away by calculating the size of the Earth 

of this redshift. The fastest moving galaxies are those with 

the largest redshifts.

• The Creation of the Universe

       Scientists agree that the Universe began 13.7 billion 

years ago in a massive fireball. This "Big Bang" was the 

beginning of everything: time, space, matter, and energy 

in the Universe.

• INFLATION

   [INFLATION is a concept that describes the process.]

           The newborn Universe was extremely thin, unimaginably hot, and dense at the 

time it started. Energy was being converted into matter and antimatter within the 

fireball. Then it started to cool and grow. The expansion was very slow for a fraction of a

second, but then the Universe exploded outwards. Since then, it has grown steadily and 

may even be accelerating.

            

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