How the universe began is still a big question for us humanity? Every energy and matter that now exists in the universe must have had a beginning. Here is the theory of the Big Bang that gave birth to the whole galaxy.
Big Bang
What happened before the Big Bang? Why can matter be born out of nothing? That is still the biggest question the universe has to answer. To better understand explosions we must accept the axiom: Void can produce material.
In 1929 at the Mount Wilson Observatory, Los Angeles, astronomer Edwin Hubble observed galaxies moving further and further away from Earth at amazing speeds. Galaxies all move away but even more strangely, those that are twice as far go twice as fast, the farther away the faster they move and so on. He very convincingly illustrated that seeing galaxies move like that meant that the galaxies were expanding and everything had to start from a single point. By measuring the expansion rate of the Universe, scientists have calculated the time of the Big Bang around 13.7 billion years ago.
How did the planets in the Solar System form ?
Look up at the night sky further and you will see the past of the Universe
Sounds like time travel, right? If you look up at the night sky, you will see stars millions of light years away. So how would you feel when you said that most of those stars died millions of years ago, all of a sudden? That’s because the light from those stars took millions of years to reach our eyes. Similarly, if you look further, you will probably see the Universe from the time it was born.
Evolutionary History of the Universe.
What was before Big Bang?
Recently, a new hypothesis has emerged from research and observations. Leading international astronomers have drawn an estimate of the age of the universe at 13.77 billion years, which coincides with the Planck Collaboration estimate. They published their results in the journal Cosmology and Astroparticle Physics. But the above published reports create a heated debate among scientists about the true age of the universe because of the odd existence of the “star Methuselah”, whose age is calculated to be around 14.5 billion years old.
This raises a conundrum, is the Big Bang the event that started the universe? Or as Roger Penrose previously said, the Big Bang is just an event that marks the universe’s self-destruction and periodic rebirth. Everything is still a mystery.