May 16

Unsolved mysteries of the universe, how much do you know?

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In fact, human knowledge of the universe is much richer than knowledge of the ocean, but there are still countless mysteries about the universe that people have not been able to solve so far. clear.

1. Fermi Bubbles

In 2010, NASA’s Fermi space telescope discovered two mysterious bubbles located in the center of the Milky Way. They have been named “Fermi Bubbles” by scientists, with their shape resembling the wings of a giant caterpillar, or hourglass. Stretching across the North and South planes of the Milky Way’s center, these two giant bubbles of gas, dust and gamma rays are up to 50,000 light-years across, about 50% of the Milky Way’s diameter.

These bubbles are giant and mysterious structures that originate from the center of the Milky Way and span about 20,000 light-years, located above and below the plane of the Milky Way. This strange phenomenon was first discovered in 2010, accompanied by intense gamma rays and X-rays, which we cannot see with the naked eye. Scientists speculate that gamma rays could be shock waves from stars swallowed by the massive black hole at the center of the Milky Way.

Notably, since it was first discovered until now, the Fermi Bubble has caused astronomers around the world a headache due to not being able to find the origin of this giant gamma-ray structure.

2. Rectangular Galaxy

This distinctively shaped galaxy was captured by Japan’s Subaru telescope. However, astronomers suspect that it is possible that the galaxy is not really rectangular. They suggest that it may look like a bulging disk, like a short cylinder. The outermost edge of this galaxy is rotating at 100,000km/h.

Astronomers from Australia, Germany, Switzerland and Finland have discovered a strange astronomical phenomenon about 70 million light-years away – the galaxy LEDAO74886, which is shaped like a rectangle.

Although most galaxies around us are shaped like a disk, a three-dimensional ellipse or an irregular bubble, some speculate that this shape was formed by collisions. of two spiral galaxies, but no one knows when it happens and no exact answer with full scientific basis has been given.

3. The Moon’s Magnetic Field

The total magnetic field strength on the moon’s surface was obtained from the lunar rover’s electron reflectometer experiment.

There is a mystery about the moon that has puzzled astronomers for a long time, even this inspired the mysterious rock buried in the ground in the movie “2001: A Space Odyssey”. This mystery is why only certain parts of the moon’s surface appear to have magnetic fields.

But after conducting many tests and analyzing the moon’s surface, scientists believe that the moon once had a magnetic field – about 450 million years ago.

However, now this magnetic field has disappeared because the angle between the crust and the core of the moon is gradually getting smaller, while the distance from the moon to Earth is also getting wider, causing the gravitational pull of the tides. gradually decreased.

  1. Why does a Pulsar have a pulse?
Pulsed stars were first discovered by Jocelyn Bell Burnell and Antony Hewish of the University of Cambridge in 1967 through radio wave radiation, and later X-ray and gamma-ray pulsars were discovered. For this success Antony Hewish was awarded the Nobel Prize in 1974. They obtained special radio waves, consisting of uniform oscillations with regular periods from a few thousandths to a few seconds. The first hypothesis they put forward was that these waves came from extraterrestrial civilizations. Today, scientists are inclined to accept the hypothesis that explains the regularity of radio waves because it is emitted by a very small and rapidly rotating magnetized star. For a star to spin so quickly without being disintegrated by centrifugal force, it must be very dense, which is a characteristic property of neutron stars.

A pulsar is a distant neutron star that rotates rapidly and emits a beam of electromagnetic radiation at a certain distance, like a rotating beam of light that sweeps across a coastline. Although the first pulsar was discovered in 1967, scientists have long wondered why these stars can emit pulsations and why pulsars stop pulsating intermittently.

However, in 2008, when a pulsar suddenly stopped pulsating for 580 days, scientists discovered that the length of time it takes to pulsate or not to pulse is related to the pulsar’s own electromagnetic field and which causes its rotational speed to decrease. Astronomers are still trying to figure out why the electromagnetic field fluctuates.

  1. Dark matter

Source text Astrophysicists are currently trying to observe the influence of dark energy – which makes up about 70% of the energy in the entire universe. But it’s not the only dark energy in the universe: about 25% of it is made up of a completely independent matter, called dark matter. Dark matter is invisible to telescopes and the naked eye, nor does it absorb or release visible light (or any form of electromagnetic radiation), but its gravitational effects are particularly pronounced. evident in galaxies and single star clusters. Although dark matter has proven to be particularly difficult to study, many scientists speculate that it may be composed of subatomic atoms (something quite different from the matter that makes up its surroundings). we).

  1. Are we still alone in the universe?

In 1961, astrophysicist Frank Drake came up with a controversial equation: By combining a series of probabilities of extraterrestrial life (the rate of star formation in the universe, the rate of stars with planets, having proportions of planets suitable for the existence of life, etc.) are multiplied together.

He speculates that there may be life forms with high IQs on other planets. But there’s a problem: despite Roswell’s conspiracy theory, we’ve yet to hear from aliens. However, recently discovered distant planets that could theoretically give birth to life have raised our hopes of detecting aliens. All we have to do is keep looking for them.

  1. How will the universe end?

Everyone thinks that the universe started with the Big Bang. But how will it end? Based on a wide range of facts, theorists believe it is likely that the fate of the universe will end in completely different ways. If the total amount of dark energy was not enough to counteract the compressive force of gravity, the entire universe would collapse into a mirror image with the Big Bang, known as the Big Crunch.


Tags

Big Crunch, Dark matter


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