Hey,
Introduction: hello my viewers. Today I am going to tell you something new about the universe.
If you want to know more about the universe then you can visit my website to know.
1. Did you know how big our universe:
Whenever you go to school your teacher does not tell you how big our universe is. Universe is 13.7 billion years old and it was expanding when it was created and now that time our universe is 93 billion light years away. Now it's expanding and we call it the observable universe but no one knows how big our universe is because It is expanding.
● OUR OBSERVABLE UNIVERSE
2. Lowest temperature of the universe:
The Lowest or coldest Temperature of the universe is - 273°C or 0 kelvin.Thats why the universe is so scary and horrible but its beauty never dies.
3. The type of matter in the universe:
Universe made up 5% of the normal matter and the 68% of the dark matter and the dark matter was formed by the dark energy.
4.What is a galactic year:
Just as our earth takes 365 days to revolve around the sun, so does our sun takes to rotate around the milky way galaxy that time is called a galactic year and it was around 230 million light. The speed of rotation is 230 km/h.
5.The biggest black hole of the universe:
We used to know that the largest black hole in our universe was Ton 618 but today we know that the largest black hole in the universe is phoenix A.
6. Sound of the universe:
Did you know that there is no sound in the universe because sound in the universe needs a medium to travel and because there is no medium there is no sound so nothing can be heard there. But light needs no medium to travel through so light can flow through any medium.
7. Expanding speed of the universe:
Our universe has an expanding speed which is around 75 kilometers per hour or one mega per second .
8.Is space and time the different thing:
Did you know that time and space are the same things? In Newton's time it was known that time and space are two different things but when it was Einstein's time we all came to know that time and space are not two separate things but both are the same and called spacetime.