If you could put Saturn in a huge bathroom, it would float (the planet is less dense than water).
A teaspoon of neutron star matter will weigh about 112 million tons on Earth.
If you could travel at the speed of light (~ 300,000 km / s), then it would take you 100,000 years to "fly around" our galaxy!
Betelgeuse (the bright star in the left shoulder of Orion) is so big that if it was located in the place of our Sun, it would swallow the Earth, Mars and Jupiter! This star is 1000 times larger than the Sun in diameter! According to some scientists, it could explode in the next 2-3 thousand years. At the peak of its explosion (which will last at least two months), the luminosity of Betelgeuse will be 1050 times higher than that of the Sun, thanks to which it will be possible to observe its death from the Earth even with the naked eye.
When you look at the Andromeda galaxy (which is 2.3 million light years away), the light that you see was 2.3 million years old, and thus you see the galaxy as it was 2.3 million years ago.
The light from the Sun goes to us for 8 minutes - we see the Sun as it was 8 minutes ago.
The Earth does not have a spherical shape - it has the shape of a flattened spheroid (flattened at the poles and convex at the equator exactly in the direction of its rotation axis).
Jupiter weighs more than all the other planets combined.
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If the Sun were the size of a point, then the nearest star would be 16 kilometers away.
Earth's gravity compresses the human spine, so when an astronaut enters space, he "grows" about 5cm. At the same time, his heart "shrinks", decreases in volume, and begins to pump less blood. It is the body's response to an increase in blood volume, which requires less pressure to circulate normally.
At the equator, your weight is about 3% less than at the poles due to the centrifugal force of the Earth acting on you.
Standing at the equator, you rotate around the earth's axis at a speed of about 1,670 km / h, while the earth rotates at a speed of 108,000 km / h around the sun.
In the orbit of our planet, there is a landfill from astronautics waste. More than 370,000 objects weighing from a few grams to 15 tons.
The mass of the Sun is 99.86% of the mass of the entire solar system, and the remaining 0.14% is accounted for by planets and asteroids.
Sun matter the size of a pinhead, placed in the atmosphere of our planet, will begin to absorb oxygen at an incredible speed and in a split second will destroy all life within a radius of about 160 kilometers.
The explosion (burst) of a supernova is accompanied by the release of a gigantic amount of energy. In the first 10 seconds, an exploding supernova produces more energy than the Sun in 10 billion years and generates more energy in a short period of time than all the objects in the galaxy combined (excluding other exploding supernovae). The brightness of such stars easily overshadows the luminosity of the galaxies in which they flashed.
On February 5, 1843, astronomers discovered a comet that was named the Big March Comet (C / 1843 D1). Flying close to the Earth in March of the same year, she "lined" the sky in two with her tail, the length of which reached 800 million kilometers. Earthlings observed the tail stretching behind the "Great Comet" for more than a month, until April 19, 1983, it completely disappeared from the sky.
In 2011, astronomers discovered a planet made up of 92% ultra-dense crystalline carbon - diamond. The precious celestial body, which is 5 times larger than our planet and heavier than Jupiter, is located in the constellation Serpent, at a distance of 4,000 light years from Earth.
In space, tightly compressed metal parts spontaneously "weld". This is due to the "cold welding" effect in vacuum. For this reason, NASA specialists treat all metal parts of spacecraft with special materials.
Contrary to popular belief, space is not a complete vacuum, although it is close enough to it. In one cubic meter of outer space, 3-4 atoms can be found.
Venus is the only planet in the solar system that rotates counterclockwise. There are several theoretical grounds for this. Some astronomers are sure that such a fate befalls all planets with a dense atmosphere, which first slows down and then twists the celestial body in the opposite direction from the initial revolution. Others suggest that the cause was the fall of a group of large asteroids to the surface of Venus.
Since the beginning of 1957 (the year of the launch of the first artificial satellite "Sputnik-1"), mankind has literally managed to "seed" the orbit of our planet with various satellites, but only one of them was lucky enough to repeat the fate of "Titanic". In 1993, the European Space Agency's Olympus satellite was destroyed by an asteroid collision.
The nearest galaxy Andromeda is located at a distance of 2.52 million years. The Milky Way and Andromeda are moving towards each other at great speeds (the speed of Andromeda is 300 km / s, and the Milky Way is 552 km / s) and will most likely collide in 2.5-3 billion years.
A person can survive in open space without a spacesuit for 90 seconds if they immediately exhale all the air from their lungs. In theory, if immediately after this an unsuccessful astronaut who has suffered in outer space is placed in a pressure chamber, he will get off with only superficial injuries and slight fright.
The weight of our planet is NOT constant. Every year, the Earth recovers by ~ 40 thousand tons and dumps ~ 96 thousand tons, thus losing about 56 thousand tons of weight.