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Universe

 

UNIVERSE

The universe encompasses everything: space, time, matter, energy, and the rules that manage them. It's enormous, puzzling, and mainly uncharted. Here is a summary of its intriguing aspects:

* Universe's Beginning: The most popular theory is that the universe started around 13.8 billion years ago from a very hot and dense point, quickly expanding in a process called the Big Bang.

* Cosmic Inflation: Almost immediately after the Big Bang, the universe expanded faster than the speed of light for a moment; this smoothed the cosmos and laid out the groundwork for galaxies to form.
* Structure of the Universe: Galaxies are huge systems of stars, gas, dust, and dark matter.
Our galaxy, the Milky Way, has over 100 billion stars.


* Stars and Planets: Stars are heated furnaces while planets orbit them.
Earth is only one of billions of planets in our galaxy alone.
* Cosmic Web: Galaxies aren't randomly scattered; they form a gigantic web-like structure with filaments and voids.

* Dark Matter & Dark Energy: Dark Matter is invisible matter that pulls gravitational forces; it makes up about 27% of the universe.
Dark Energy is a mysterious force causing the universe's rapid expansion; it accounts for approximately 68% of the universe.
* This implies that everything we can see, like stars, planets, and nebulae, constitutes less than 5% of the total universe!
* Time and Space: Einstein's theory of relativity showed that space and time are connected.
Large objects like stars and black holes warp spacetime.
* The universe continues expanding, and galaxies move away from each other.
The farther away a galaxy is, the quicker it moves away.
* Mind-Bending Ideas: Some theories propose our universe may be just one of manyâ each with distinct laws.
* Black Holes: Regions of space where gravity is so strong that even light can't escape.
They challenge our comprehension of physics.
* Wormholes: Hypothetical tunnels through spacetime connecting distant parts or even different universes.

* Exploration and Discovery: Telescopes like the James Webb Space Telescope discover galaxies formed right after the Big Bang.

* Space Missions: Probes like Voyager have left our solar system, and missions to Mars and beyond expand our reach.

* Scientists search for signs of life on planets outside our solar system.
(SETI & Exoplanets)

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