Today's video tackles about the importance of the sun.
Bad Sunny! Oh no, little Kitty the great glorious sun isn't bad, but it's the reason
behind everything good on our earth. Hey friends, it's easy to take free things for
granted, like the sunlight. But have you ever wondered what will happen if the sun
suddenly blinked out of existence? Well, in today's episode, let us shed some light
on this dark possibility and answer a life-threatening question, what if the sun
diasppeared? Imagine you wake up in the morning for a quick dose of vitamin D from
the sun. So you open the window and feel the energy from those warm rays as
you happily pick up the newspaper that reads the headlines, the sun is going on
a summer vacation forever! So you panic sweat while biting your nails, and wonder,
"What will happen now?" Well, the answer is nothing! But only for the first eight
minutes or so. Yes, as we know, light takes approximately eight minutes to reach
our surface from the sun. So we'd still see it in the sky for some time but then,
things will just take a turn for the worse. Yes, the first thing you will notice is the
darkness around the world. Although you would be able to see the distant stars,
but apart from them, there won't be any other natural source of light, not even
the silver moon as it gets its light from the sun. And as Einstein's theory of
relativity suggests that gravity travels at the speed of light. So afteer those
initial eight and a half minutes, there won't be any gravitational force to hold the
earth on a particular orbit, and it will fly away into the solar system into the endless
space in a straight line at the speed of eighteen miles per second. And if we are
lucky enough not to collide with other planets and asteroids or get absorbed by
a black hole, we will continue to travel for the next forty-three thousand years
until we find another star to orbit around. But that would be rather a long time.
The current scenario on earth will continue to depreciate, and the next we will
witness is that without the sunlight, photosyntesis would stop, but that would
only kill some of the plants. Yes, fortunately, some larger trees can survive for
decades without it, but eventually, sooner or later, they will meet their end as
well. Later, within a week or so, the temperature would begin to drop below
zero that would put most living organisms on the verge of extinction, including
humans. And within a couple of months, the ocean's surface would freeze
over, but ut would take another thousand years for our seas to freeze solid.
Until then, the oceans's interior will remain liquid due to the heat emitting from
the earth's core. because of this, the organisms living in the deep ocean that
doesn't need sunlight will continue to thrive for billions of years until the water
completely turns into ice. And our beautiful green planet would be nothing but
a barren wasteland floating aimlessly through space. So, we should be thankful
for the great sun because of which everything is in perfect order. Trivia time.
Did you know astronomers estimate that the sun has about 7 billion to 8 billion
years left before it sputters out and dies? But before that, in about 5 billion years,
the sun will run out of hydrogen. HJope you learned something new in today's
episode until next time. It's me, Dr. Binocs zooming out! Ah, nevermind!
1. Why is the Sun important for life on Earth?
2. Enumerate different results if the sun disappeared.
3. Do you like the sun? Why or why not?