The Sun's core rotates abnormally fast. Free Technical Library News

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The Sun's core is spinning anomalously fast

02.08.2017

The core and inner layers of the Sun rotate about four times faster than its surface, which contradicts all generally accepted ideas about its structure.

"The most plausible explanation for this mystery is that the core of the Sun rotates faster than its outer layers due to the energy it accumulated 4,6 billion years ago, when the sun was just beginning to form. This is a big surprise for us, and we like to think that we have discovered the first real traces of that , what the Sun looked like at the time of its birth,” says astrophysicist Roger Ulrich from the University of California at Los Angeles (USA).

The speed of rotation of stars around its axis is an important characteristic for astronomers, since it allows you to calculate the age of the star, determine its type, understand how often “starquakes” occur inside it and find out if it has satellites. As a rule, young stars rotate faster than old ones, which is what scientists use when searching for "twins" of the Sun and "newborn" celestial bodies.

Observations of the last 40-50 years, according to Ulrich, indicated that the interior of the Sun should rotate around its axis at the same speed as the outer layers, on the basis of which many other ideas about the behavior and structure of other stars were built. It was incredibly difficult to test these hypotheses, since traces of the rotation of the bowels of the star, the so-called hydrodynamic gravitational waves, cannot be seen on its surface, because they do not reach there.

Scientists were able to follow their movement through the bowels of the Sun, observing a different type of waves, seismic vibrations that occur in the deep layers of the star during "sunquakes". Scientists have been following them for several decades with the help of SDO, SOHO and a number of other space observatories.

The SOHO probe has been continuously monitoring the interior of the Sun for more than 16 years, which made it possible to start searching for such bursts in archival data, analyzing them using supercomputers.

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South Korea will abandon the nuclear power plant 23.06.2017

The South Korean government plans to freeze preparations for the construction of new nuclear power plants and gradually decommission existing reactors.

The concern of the authorities regarding the danger of nuclear reactors was caused by a major disaster at the Fukushima-1 nuclear power plant in 2011. President Moon began a policy of phasing out nuclear energy. It aims to transfer the country to alternative energy, including solar and wind energy.

According to the head of South Korea, many nuclear power plants are located too close to residential areas - in the event of a nuclear catastrophe, the country will face "unimaginable consequences." In addition, South Korea is not immune from earthquakes, which also poses a threat of disaster.

Today, the country has 25 nuclear reactors that generate about 30% of all electricity. The service life of most of the nuclear power plants expires in the period from 2020 to 2030.

The President also promised to abandon coal energy to reduce air pollution. However, according to experts, this measure could dramatically increase the cost of utilities in a country where coal-fired energy accounts for about 40% of all electricity.

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