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The origin of the Universe and it’s evolution.

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The origin of the Universe and it’s evolution.

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Have you ever wondered how the universe originated?
In this timeline we will tell you how science has theorized it!

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13.8 billion years ago

When the Big Bang occurred, matter, energy, space, and time were all formed, and the universe was infinitely dense and incredibly hot.

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The Universe had enough Hydrogen and Helium but it was irregularly distributed. Several over-dense region’s gravitationally collapsed to form the first stars. The temperature in the early Universe was too high to self-formation of gravitationally bound objects. Dark matter provided the additional gravity. Stars came together to form clusters. Clusters came together to form small galaxies. Small galaxies started merging. The Milky Way Galaxy started growing in size.

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14 - 9 billion years ago Galaxy Formation ☄️

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14 - 9 billion years ago Galaxy Formation ☄️

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A theory says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form. On the other hand, says the young universe contained many small "lumps" of matter, which clumped together to form galaxies. Hubble Space Telescope has photographed many such lumps, which may be the precursors to modern galaxies, most of the early large galaxies were spirals but over time, many spirals merged to form ellipticals.

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So we don’t have yet a definitive model of how galaxies form

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The Sun and the rest of the solar system formed from a giant, rotating cloud of gas and dust called a solar nebula, as the nebula collapsed because of its overwhelming gravity, it spun faster and flattened into a disk, most of the material was pulled toward the center to form our Sun, which accounts for 99.8% of the mass of the entire solar system.

The sun was born about 4.6 billion years ago.The sun has enough nuclear fuel to stay much as it is now for another 5 billion years. After that, it will swell to become a red giant.

Like all stars, the Sun will someday run out of energy. When the Sun starts to die, it will swell so big that it will engulf Mercury and Venus and maybe even Earth. Scientists predict the Sun is a little less than halfway through its lifetime and will last another 6.5 billion years before it shrinks down to be a white dwarf.

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The Solar System was a really messy place at this time, with gas and dust and debris floating around. But planet formation appears to have happened relatively rapidly. Small bits of dust and gas began to clump together. The young Sun pushed much of the gas out to the outer Solar System and its heat evaporated any ice that was nearby.

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Our home planet is the third planet from the Sun, and the only place we know of so far that’s inhabited by living things. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal.

When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.

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The giant impact hypothesis called the Big Splash, or the Theia Impact that the Moon formed from the ejecta of a collision between the proto-Earth and a Mars-sized planetesimal, approximately 4.5 billion years ago, in the Hadean eon (about 20 to 100 million years after the Solar System coalesced).

The giant-impact hypothesis is currently the favored scientific hypothesis for the formation of the Moon.

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The giant-impact hypothesis is currently the favored scientific hypothesis for the formation of the Moon. Supporting evidence includes:

Earth's spin and the Moon's orbit have similar orientations.

Moon samples indicate that the Moon's surface was once molten.

The Moon has a relatively small iron core.

The Moon has a lower density than Earth.

There is evidence in other star systems of similar collisions, resulting in debris discs.

Giant collisions are consistent with the leading theories of the formation of the Solar System.

The stable-isotope ratios of lunar and terrestrial rock are identical, implying a common origin.

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Thanks for your attention, adventurer, come back soon! ✨

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Thanks for your attention, adventurer, come back soon! ✨