video. Today we are going to learn about the most
important star in the universe, today we’re going to study
The sun is a star, an enormous sphere of extremely hot
gas which is continuously shining and spinning around. It
seems much bigger and brighter than other stars but that
is only because our planet is close to it, more so than to
any other star. The sun is in the center of our system and
that’s why we call it the solar system and all the planets
in it revolve around the sun. It has been shining in space
for more than 4 and a half billion years! Yup I said B, for
Billion and scientists claim it will continue to do so for
another 5 billion years! That’s incredible!
The sun is composed of gas. The majority of this gas is
hydrogen and helium though there is also some carbon,
nitrogen and oxygen. It shines so brightly and transmits
so much energy because in its interior there are atomic
reactions which turn the hydrogen into helium. To give
you an idea, the surface temperature on the sun is 5.800
degrees celsius. In only one second, more energy is
released from the sun than that which has been
consumed by all humanity so far. Just in one second!
Compared to Earth, the sun is enormous. One million
three hundred thousand planets the size of our Earth can
fit inside the sun. It is also very far from our planet. Do
you know how long it would take us to get to the sun?
Well, when taking into consideration that the sun is 150
million kilometers away, if we were to travel from the
Earth to the sun by car at a speed of 100kms an hour, we
would take… 170 years to get there! Though the light
that the sun emits, doesn’t take that long to get to the
Earth. It takes only 8 minutes for the light to travel from
moment it leaves the sun till it reaches our planet. That’s
300 million kms per second! It’s absolutely mind-blowing!
It can circle the world 7 times in one second. There is
most definitely nothing faster than light.
So now we have learnt a little more about the sun, our
star and about light. I hope you found it all very
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