User:Strange177A/sandbox

Journey Of Our Universe

The Big Bang A long ,long ,long ,long ,long ,long, time ago  more than a hundreds of billions of years ago there was a time when there was nothing in the space- even no universes, galaxies , stars , planets and moons ,  except a tiny and dense ball of matter and plasma called as Singularity. It was moving freely in the space. But a day came, 13.8 billion years ago, when it expanded more than a million times in a fraction of second. The moment after expanding, it formed the universe. It not only formed our universe but it also formed many universes which is now called the Multiverse [A group of all universes with different laws of nature]. But the story has not ended ! When the, they left a bit of their portion, in each universe. Now let us zoom into our universe. Again a day came, 13.6 billion years ago when the rocks in our universe too, hit each other and collided again ! But this time it formed galaxies after colliding. The Singularity which formed our galaxy the Milky way again left a bit of their portion in a part of our galaxy.

The formation of the solar system After the hitting and colliding of the rocks, let us zoom into our galaxy- the Milky way. This time too, it left a bit of its portion in a part of our galaxy, and again 4,600 billion years ago it hit to another rock and formed all the planets and the sun. At first it was in the form of hot plasma. When still all planets were not dried, one day, 4,500 billion years ago, an another rock attracted to Earth’s  gravitational force and hit Earth and collided. It started revolving around the Earth. This became the Moon. A few years later, all the moons and stars and asteroids were formed. Many years later, they all were dried and became strong solid crust.

The Earth Time passed very fast. Our Earth has been formed 4.6 billion years ago. Now our Earth has started cooling. Around 4.28 billion years ago water started condensing in liquid form on Earth. Around 3.9 billion years ago birth to organic life took place on Earth. Now let me show you the evolution of Earth.

Period	Time	What happened Precambrian	4600 m.y.a [million years ago ]	Birth to unicellular and soft bodied multicellular organisms Cambrian	570 m.y.a	Shelled invertebrates appeared Ordovician	510 m.y.a	Marine plants and coral reefs appeared Silurian	439 m.y.a	Land plants appeared Devonian	409 m.y.a	Vertebrates and amphibians appeared Carboniferous	363 m.y.a	Coal forming forests flourished Permian	       290 m.y.a	Conifers and early desertification occurred Triassic	250 m.y.a	Marine reptiles appeared Jurassic	200 m.y.a	Dinosaurs and birds appeared Cretaceous	145 m.y.a	Flowering plants and small mammals appeared and gas and oil deposits formed Tertiary	65 m.y.a	Dinosaurs became extinct, Himalayas began to form, large mammals appeared and Colorado river began to cut out the grand canyon Quaternary 	1.64 m.y.a	Last glacial period occurred and modern humans [ Homo sapiens ] appeared

The human world In last part you read about the evolution of Earth. Now let us see the human age. Time	What happened 1.4 m.y.a	 Hominids used controlled fires 70,000 years ago	 Tahoe glaciation occurred 11,000 years ago	 Development of agriculture 4,500 years ago	 Pyramids of Giza were built 1543	 Modern scientific revolution 1760	 First industrial revolution 1903	 The invention of flight 1957	 The beginning of space age 1969	 The landing on moon Above 2000 	Arrival to our modern world

Now, the Sun is 5 billion years old. Its total age is 10 billion years. So it will still burn till 5 billion years ahead. After 5 billion years ahead it will die. It will explode after 5 billion years ahead. After it dies, it will form a black hole. After forming a black hole the world will start from the beginning – The big bang, Precambrian period, Cambrian period, Ordovician period...

The universe of facts This universe is made up of facts. There is no place without any facts in universe- Sky, Water etc. Isn’t it ? So now, let us see some facts- 	The Solar System is more than 4 billion years old ! 	Neptune has many moons, it has at least 13 ! 	The summers are long on Uranus, they last 21 years ! 	Saturn is so light that if we could put in water it would float ! 	Rusty rocks on Mars have made the planet red ! 	Venus and Earth are like twins, they are the same size ! 	Mercury is so tiny that 18 of them would fit inside the Earth ! 	The Sun is really hot, more than 15 million Celsius ! 	There are more than 200 stars in our galaxy ! 	There are no showers in the ISS {International space station }, we must use wash clothes ! 	The longest ever spacewalk lasted for nine hours ! 	Rockets travel at over 28,000 km/hour!