The fatality rate was over 2 percent, in one study. It appears to be less often fatal than the coronaviruses that caused SARS or MERS, but significantly more so than the seasonal flu. It is hard to accurately assess the lethality of a new virus. The disease it causes is called Covid-19. Middle East Respiratory Syndrome, or MERS, first reported in Saudi Arabia in 2012, is also caused by a coronavirus. The virus was contained after it had sickened 8,098 people and killed 774. Most people get infected with one or more of these viruses at some point in their lives.Īnother coronavirus that circulated in China in 2003 caused a more dangerous condition known as Severe Acute Respiratory Syndrome, or SARS. Sources: the Hindu.At least four types of coronaviruses cause very mild infections every year, like the common cold. Operating in the frequency range 70–300 MHz, the main scientific goals of the MWA are to detect neutral atomic Hydrogen emission from the cosmological Epoch of Reionization (EoR), to study the sun, the heliosphere, the Earth’s ionosphere, and radio transient phenomena, as well as map the extragalactic radio sky.It is a joint project between an international consortium of organisations to construct and operate a low-frequency radio array.These speeds are so high that the particles can escape the Sun’s gravity.Ībout Widefield Array (MWA) radio telescope: The corona’s temperature causes its particles to move at very high speeds. From it comes the solar wind that travels through our solar system. Yet the corona is hundreds of times hotter than the Sun’s surface. The corona is in the outer layer of the Sun’s atmosphere-far from its surface. Astronomers have been trying to solve this mystery for a long time. The corona’s high temperatures are a bit of a mystery. This low density makes the corona much less bright than the surface of the Sun. The corona is about 10 million times less dense than the Sun’s surface. However, the corona can be viewed during a total solar eclipse. That makes it difficult to see without using special instruments. The corona is usually hidden by the bright light of the Sun’s surface. The Sun’s corona is the outermost part of the Sun’s atmosphere. Researchers believe that these explosions could indeed be heating up the corona. These observations are the strongest evidence till date that the tiny magnetic explosions, originally referred to as ‘ nanoflares’ by eminent American solar astrophysicist Eugene Parker. The radio lights or signals under study result from beams of electrons accelerated in the aftermath of a magnetic explosion on the Sun. The data was collected with the help of the Murchison Widefield Array (MWA) radio telescope. Sun’s Coronaįor Prelims and Mains: Corona- location, features, effects.Ĭontext: Scientists have recently discovered tiny flashes of radio light emanating from all over the Sun, which they say could help in explaining the long-pending coronal heating problem. Topics Covered: Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.
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