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Compression of the Universe, or how to fit all its stars in the Milky Way

Every day we are faced with compression in one form or another. When we squeeze water out of a sponge, pack a suitcase before vacation, trying to fill all the empty space with the necessary things, compress the files before sending them by e-mail. The idea of ​​removing “empty” space is very familiar.

Milky Way

Both on the cosmic and atomic scales, scientists have repeatedly confirmed that emptiness occupies the main space. And yet it is extremely surprising how true this statement is! When Dr. Caleb A. Sharf of Columbia University (USA) wrote his new book, “The Zoomable Universe,” he, by his own admission, planned to use it for some kind of dramatic effect.

What if we somehow manage to collect all the stars of the Milky Way and place them next to each other, like apples tightly packed in a large box? Of course, nature will never allow man to subjugate gravity, and stars will most likely merge into one colossal black hole. But, as a thought experiment, this is a great way to illustrate the amount of space in the Galaxy.

The result is shocking. If we assume that the Milky Way can have about 200 billion stars, and we generously believe that they are all the diameter of the Sun (which is overestimated, since the vast majority of stars are less massive and smaller in size), we could still assemble them into a cube, the length of the faces of which corresponds to two distances from Neptune to the Sun.

“There is a huge amount of empty space in space. And that brings me to the next level of craziness,” Dr. Scarf writes. According to the observable Universe, defined by the cosmic horizon of light movement since the Big Bang, current estimates suggest that there are between 200 billion and 2 trillion galaxies. Although this large number includes all the small “protogalaxies”, which will eventually merge into large galaxies.

Let’s be brave and take the largest number of them, after which we will pack all the stars in all these galaxies. Impressively generous, suppose they are all the size of the Milky Way (although most are actually much smaller than our Galaxy). We will get 2 trillion cubes, the faces of which will be 10 ^ 13 meters. We place these cubes in a larger cube, and we will remain with a megacube with a side length of approximately 10 ^ 17 meters.

Pretty big, right? But not on a cosmic scale. The diameter of the Milky Way is about 10 ^ 21 meters, so a cube of 10 ^ 17 meters in size still occupies only 1/10 000 of the size of the Galaxy. In fact, 10 ^ 17 meters is about 10 light years!

Naturally, this is just a little trick. But it effectively indicates how small the volume of the Universe actually occupied by dense matter, compared with the emptiness of space, perfectly characterized by Douglas Adams: “The cosmos is great. Really great. You simply won’t believe how vast, enormous, breathtakingly large the cosmos is. Here’s what we mean: you might think that the nearest diner is far away, but for space it means nothing.” (“The Hitchhiker’s Guide to the Galaxy ”).



NASA published pictures of two giant asteroids

NASA published an amazing image of two giant asteroids traveling in the asteroid belt, both of which are larger than some of the cities in the world.

The American Space Agency shared a snapshot that tracks the movement of the large asteroids Lina and Klotho, located in the asteroid belt between Mars and Jupiter. The Lina is about 37 miles (60 km) in diameter and has more than 2,000 days in orbit around the Sun. Klotho is slightly larger, having 50.9 miles (82 km) in diameter and has a 1596-day orbit around our main star.

NASA observed space rocks using the NEOWISE telescope. He also states on his official website:

“appearing as rows of orange dots, the brightest sets of dots belong to the asteroids of Klotho and Lina. Both rotate in the main asteroid belt between Mars and Jupiter, while smaller and more distant asteroids can also be seen on this image ”

These space objects were photographed by NEOWISE as part of the Wise mission (Wide-field Infrared Survey Explorer) asteroid hunting project. 

Cosmic stones within the asteroid belt supposedly pose almost no danger to the Earth, due to the role that Jupiter plays in the solar system. The giant planet has such a powerful gravitational attraction that it actually helps to keep the asteroid belt in place, so objects do not travel throughout the system.

If Jupiter did not use its gravitational pull on these objects in the belt, the inner planets would be constantly at risk of collisions with large asteroids.

“The presence of Jupiter actually protects Mercury, Venus, Earth, and Mars from repeated collisions with asteroids!”, The NASA statement said.

The probability of a major asteroid colliding with the Earth is one in 300,000 chance. However, such a prospect is possible, NASA says.

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A “Meteorite” falls in Nigeria destroying more than 100 houses and leaving a huge crater

On the morning of Saturday 28 March 2020, a large meteorite crashed in Akure (Nigeria), destroying more than 100 houses and leaving a 21-meter crater on the ground. Experts from the Awbaowo University of Obafemi (Nigeria) denied the local police who initially claimed that a bomb explosion had created the 21-meter crater.

According to Nigerian sources, the explosion destroyed the Akure-OVO road and seriously damaged dozens of houses, from 50 to 100, as well as schools and churches.

It is interesting that initially the authorities denied the meteorite’s fall and claimed that the cause for the explosion was a truck with explosives, which was transported to a neighboring state. Ondo State Governor Rotimi Akeredolu said the blast was an accident.

Then the version changed and the truck was no longer just transporting explosives, but it was supposedly a terrorist act.

Now, a team of experts and scientists came to the conclusion that everything that happened was a fall of a large meteorite.

The blast that shook Akure, the state capital of Ondo, on Saturday, was caused by a giant cosmic rock, a team of experts concluded.

Led by Adepelumi Adekunle, a professor of geophysics and seismic engineering at Obafemi Avolovo University, the team said that the meteorite entered the atmosphere of our planet at a “43 degree angle”.

Adepelumi Adekunle’s report reads:

“My research team conducted a detailed analysis of the impact site. A round impact crater was discovered with a diameter of 21 m and a depth of 7.8 m, which indicates a natural phenomenon.

– It was found that water is oozing from the edges of the crater. Preliminary field studies of vibration, noise, seismicity, analysis of water, radioactivity, rocks and soil were carried out.

“Our findings suggest that the impact of the explosion covers a radius of 1 km from the vicinity of the crater.” No signs of fire or burning were found in the vicinity. “

“No signs of radioactive radiation were found within the crater and in the immediate vicinity of it. Field data indicate that a meteorite from the asteroid belt was moving at high speed from space, and fell at an angle of 43 degrees in the southwestern part of the country “

A local source said that after the incident, no one was missing and no one was killed. The most interesting thing in the report is the mention that “unusual stones and strange metal objects” were found inside the crater. So what actually fell in Nigeria – a meteorite or a UFO?

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Something strange is happening with the interstellar comet 2I / Borisov

When astronomers see something in the Universe that at first glance seems to be one of a kind, this will certainly cause great excitement and attention.

This mysterious guest from the depths of space first attracted the attention of celestial observers at the end of August 2019, when it was officially discovered sweeping through the solar system along a trajectory indicating interstellar origin.

After analyzing the object, astronomers identified it as a comet called Comet 21 / Borisov, which is the first identified comet and the second observable interstellar alien after the infamous Oumuamua, who arrived here from another star.

NASA claims that they do not know where and when the comet began to move towards our Sun. Gravity of the Sun slightly deflects its trajectory, but cannot capture it due to the shape of the orbit and its high speed of about 160,934 km / h.

Hubble showed that the comet’s heart, a loose accumulation of ice and dust particles, was probably no more than 975 meters across, about the length of nine football fields.

Now, this month, astronomers have discovered that something strange is happening by checking the object.

In the next video, nemesis maturity explains what happens to this mysterious interstellar guest.

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