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Yogita Ingle 5 years, 5 months ago
⇒ Every person, planet star and a galaxy is a part of a universe - and even empty space.
⇒ Universe can be defined as everything that exists. It is the biggest thing we have a word for.
⇒ the universe is too big, In speed of light, it would take about 15 billion years to cross it as far as we know.
⇒ The universe has started about 12 - 15 billion years ago, due to big bang.
⇒ Big bang was a huge explosion that created all the mass and energy in our universe in less than a second.
⇒ The big bang was super hot! It is 10^27°C, meaning 10 with 27 zeros after it.
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