![]() That makes it difficult to see without using special instruments. "They feature 300,000-mph velocity spikes that are so strong, they actually flip the direction of the magnetic field. The corona is usually hidden by the bright light of the Sun’s surface. "When you get closer to the sun, you start seeing these 'rogue' Alfvén waves that have four times the energy than the regular waves around them," Kasper said. The Parker Solar Probe detected those waves behaving in a strange and unexpected way in the neighborhood closer to the sun. For the first time in history, a spacecraft has touched the Sun. How could scientists determine that this was the same gas that had been identified on the sun Helium. After all, less than 0.001 of the Sun’s entire power is required to sustain the corona and all of it is carried by convective motions just under the surface. Some researchers had suspected that magnetic "Alfvén waves," oscillations long ago discovered in the solar wind, might play a role. In 1888, traces of helium were isolated here on the earth. The probe also turned up new clues that could help resolve an old mystery: Why does the corona get hotter the farther you are from the sun's surface? Space weather forecasting will need to account for these flows if we are going to be able to predict whether a coronal mass ejection will strike Earth or astronauts heading to the moon or Mars," Kasper said. That means researchers will need to completely rewrite calculations used to predict space weather. Scientists knew that the sun's magnetic field tugged on winds as they made their way out of the corona, but the probe found that effect to be 10 to 20 times more powerful than scientists had thought. and CMEs typically occur where the prominences found on the Sun. 12, 2022 Researchers have discovered web-like plasma structures in the Suns middle corona. ![]() 4), those observations painted a picture of a corona that is both more active and more mysterious than it appeared based on observations from Earth.įor example, the probe found that researchers were wrong about how the sun aims its blasts of solar wind into space. The Sun's corona can be seen extending for 25 solar radii towards the horizon, and a spectacular 40 solar radii away from it. ![]() The corona can be seen only during solar eclipses, when the main radiation from the Sun's surface is blocked by the passage of the Moon or with special instruments. Published as a series (opens in new tab) of four (opens in new tab) papers (opens in new tab) in the journal Nature (opens in new tab) on Wednesday (Dec. The corona has been found to emit X-ray radiation (the corona is a plasma at temperatures greater than a million degrees a plasma will radiate a lot of X-rays). ![]()
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