According to the big-bang theory how the universe might end?

If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets.

According to the big bang theory, it is the phenomenon which has given birth to the universe that now we live in. The expansion of Universe occurred at a very high speed which resulted into a huge explosion but it took place in a very short period of time. Due to the reasoning it is referred to take place from a small singularity which was very densely populated with matter and antimatter. These came into existence and later on, the atoms combined to form molecules and gases.

Explanation:

As per the approval of the Big Bang Theory simply prior to the investigation of Dark Energy during the year 1990s. The cosmologists had proceeded to grant on two situations as signifying the commonly expected consequences for our Universe.

Primarily the generally recognized as the “Big Crunch” synopsis, the universe will approach the greatest size and suddenly start to collapse in upon itself. This will barely be feasible if the size density of the Universe is larger than the significant density.

The Second situation is termed as the Big Freeze. The density in the galaxy was comparable to or under the demanding density, the development would reduce without stopping.  

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