Interesting facts about the universe you may not know

So far, the vast cosmic world still contains many mysteries that modern science has yet to discover. However, with what we already know about the universe, there are quite a few facts that make us feel surprised. Here is a list of things like that.

15. The Sun takes a long time to spin all around the Milky Way

The truth: The last time the Sun was in its current position was when dinosaurs still existed on our planet.

The Earth takes 365 days to orbit the Sun, about 93 million miles away! But it will take about 225 million years for the Sun to reach the center of the Milky Way.

14. Mars has a larger mountain than Everest

Truth: You will wonder where the true height of this volcano is? The answer is, you put the stack of 3 Everest tops together!

This volcano is as high as 16 miles from the ground. Its name is Mount Olympus.

13. The number of newly discovered planets increases exponentially

Back in the 1995s, for the first time, scientists found an extraterrestrial planet, orbiting four days around the constellation Pegasi 51. In recent years, the number of newly discovered planets has reached 1900, of which 900 planets were discovered in 2014, and the number will continue to increase in 2015.

12. A Mars-sized planet has crashed into Earth billions of years ago

Scientists have hypothesized that the moon is now formed after a collision between Earth and a Mars-sized planet about 4 billion years ago, about 100 million years after Solar system is formed.

So far, this assumption is the most logical explanation for the question of the formation of the Moon. Another proof demonstrates this hypothesis that the material structure of the Moon and the Earth is quite similar.

11. The fire storm on Jupiter is 3 times the size of the Earth

Jupiter's fire storm is a long-lasting, stormy storm that lies south of Jupiter's equator. The size of this storm is three times the size of the Earth.

These storms usually last up to 150 years, but this storm is a special case, it has lasted for hundreds of years and has not shown signs of stopping!

10. The planet is super light

Truth: If we put Saturn in the water, it will float.

Saturn's mass density is so small that if we put this planet into a huge, fictitious water tank, it could emerge. The density of Saturn is 0.687g / cm ³ while the specific water volume is exactly 0.998g / cm ³ . Of course, the water tank must be extremely large as the Saturn equator has a radius of 60268km.

9. We are moving constantly

Truth: We are moving in the universe at a speed of 530km / s.

Our galaxy is called Milky Way spinning at a speed of 225km / s and traveling through space at a speed of 305km / s. Thus, we are moving in space at a speed of 530km / s. Or in a minute we have left the original location of 19,000km. However, it is not so important because of Einstein's theory of relativity, the movement speed of any object in space is insignificant.

8. The Earth is leaving its companion - Moon

Fact: The moon is slowly leaving the Earth.

The moon is moving away from Earth at a rate of about 3.8cm per year because of the tidal effect. As a result, the Earth is slowing about 2 milliseconds every day for a century. Scientists do not know the background of the moon, but generally we accept a hypothesis that a Mars-sized object has crashed into the Earth and caused part of the Earth to split and shape. The Moon.

7. Sunlight

Fact: The light has hit Earth from 30,000 years ago.

The energy in sunlight that we see today originated from the Sun's core 30,000 years ago. Sunlight passes through dense molecules in a special state that creates the sun and only takes 8 minutes for them to travel to Earth. The temperature in the solar core region reaches 13.6 million degrees K. All the energy generated by decay in this core zone must pass through many layers to the atmosphere of the sun before being released into the lower space. light or kinetic energy of solar dust particles.

6. Solar wind

Fact: The sun loses 1 billion kg per second by the solar wind.

The solar wind is a stream of charged particles escaping from the upper surface of the Sun by the extremely high temperatures of the sun's corona (Corona) and they have great kinetic energy. The energy of such a particle can kill a person from a distance of 160km. But why these charged particles can accumulate such large kinetic energy so far remains a mystery to scientists.

5. The Big Hero is not a constellation

Fact: The Big Hero is actually not a constellation but a star group.

Many people believe that the Big Dipper is a constellation (also known as the Dipper - very important to determine the North Star), but it is actually a star group. A star group is a group of stars in the sky that are not on the official 88 constellations list but they are made up of stars that are not physically related to each other and far away from each other. A star group can be made up of stars of one or more different constellations. In the case of Dai Hung Tinh, it is made up entirely of the 7 brightest stars of the Big Bear (Ursa Major).

4. George's star

Truth: Uranus was originally named 'George's star'.

When William Herschel discovered Uranus in 1781, he decided to choose a name for this planet, Georgium Sidus (King George's star), in honor of King George III of England.

He explained his decision as follows: 'In the ancient era the names Mercury, Venus, Mars, Jupiter and Saturn were assigned to the planets according to the names of heroes and legendary saints. . At the present time, we have lived in an era of modern science and philosophy, so we should not continue to use old naming. Could I still call the new planets Juno, Pallas or Minerva? The best way for any historical event is to rely on its chronicle. In the future, if there is a question of when the last planet of the Earth was found, the best answer would be: the reign of King George III ". God still prevailed, and the new planet was named Uranus, and was considered the king of all because this is the outermost planet we know of at the time.

Uranus is also the first planet detected by telescopes.

3. The Moon of the Earth

Fact: The Earth has at least 4 moons.

This is not necessarily true. In 1986, Duncan Waldron discovered an asteroid with an elliptical orbit around the sun with an age that evolved near the Earth and is connected to our planet. This cyclic asteroid is named Cruith after the name of a group of Scott ancient people. Because of this unusual relationship with the earth, this asteroid is sometimes referred to as a second moon of the Earth and requires a 12.5-inch reflecting telescope to observe Cruithne. Since then, at least 3 similar asteroids have been discovered. These objects are also found in similar relationships with other planets in the solar system like the Cruith with the Earth.

2. Sun disk and music

Fact: The Sun's disk activity is the main cause of Stradivarius 's name .

Antonio Stradivari is considered the greatest violin maker. He lived in Italy in the 17th and 18th centuries. Scientists could not explain what made his violin so incredible, but they discovered Stradivari wood . To make a violin is an extremely important factor. From the 1500s to 1800s, the Earth experienced a less frosty period because of the increase in volcanic activities and the decline of the Sun's activity (also known as Maunder decline). Therefore, the trees Stradivari uses to produce violins are extremely hard because they grow more slowly, which contributes to making the violin sound great. Maybe if born in another period, his name could not be as famous as it is today.

1. Cold welding in the universe

Fact: If two pieces of metal collide in space, they will stick together permanently.

This may sound unbelievable, but it is true. Two pieces of rough and uncoated metal will form a single piece in space. However, this cannot happen on Earth because the atmosphere has created an oxidized metal layer covering the metal pieces. Scientists have discovered this special phenomenon thanks to an experiment so far the only way to promote a reaction called Cold welding. Thankfully for us, this is not a big problem on space stations because all the metal equipment is brought up from Earth.