Like a planet. Because the universe is too big! In the vast universe, there is the Milky Way.
Department, now we know the relevant knowledge of the Milky Way, but the secret of the universe, for
We are still a mystery! There are more than a dozen planets in the Milky Way where we live.
Ball, fiery red sun, beautiful Saturn surrounded by halo, cold Pluto,
Mars, Mercury, Uranus and so on.
The moon is the smallest planet. It is only a few million kilometers away from our earth.
It is far away, but our world has a long history of landing on the moon. At that time, the American grandmother
Tear, driving the Apollo spacecraft to land on the moon, there is no space on the moon.
Gas, so astronauts must carry heavy oxygen tanks. Lift a piece on the moon
Big rocks, don't bother, because the gravity on the moon is smaller than that on the earth.
The weight is only one sixth of that of the earth. How's it going? Is it light? Eclipse, me
I'm sure you've seen it. That's because the sun didn't shine on the moon, but the earth just blocked it.
The rays of the sun, so there will be a solar eclipse.
The sun is the largest planet in the galaxy! Its surface temperature is 6000 degrees Celsius,
The central temperature is about three thousand times the surface temperature! It's almost1500,000 degrees Celsius,
This temperature is really a miracle of the universe! Even if something touches it, it will
Turn into gas, ah! This is an amazing temperature. We [for example]: If we take a step,
Ok, it will take more than 3500 years to go to the sun, that is, by plane [jet plane]
Type], also want to fly for more than twenty years! We see the sun on the earth, but it is small, because.
Because the sun is too far away from the earth, it is so big!
There are many planets bigger than the sun! The sun is a star. These two stars also
Big enough! Betelgeuse is more than 200 times the size of the sun! Betelgeuse is the planet of the sun.
More than 500 times, what an amazing number!
The universe is infinite! The universe is a treasure house, which contains a lot of knowledge.
Know! He is waiting for us to dig for "treasure" when we grow up, and I want to be one when I grow up.
An astronomer, to explore this mysterious universe!