[▲ The Antarctic of the Sun (Credit: ESA & NASA / Solar Orbiter / EUI Team) taken by the extreme ultraviolet imager (EUI) of the solar spacecraft “Solar Orbiter”]
This is the European Space Agency (ESA) solar probe“Solar Orbiter”It was taken with the extreme ultraviolet imager “EUI (Extreme Ultraviolet Imager)” installed in the camera.Antarctica of the sunis. According to ESABright areaThen the lines of magnetic force are closed in a loop (closed lines of magnetic force), and EUI isTrapped plasmaReleased fromUltraviolet raysIs captured.On the other handDark areaThen the lines of magnetic force are not closed,Plasma flows out into outer spaceCan create a solar wind.
Solar OrbiterMarch 26, 2022、0.32 AU to the sun= Up to approximately 48 million kmClose observationThe we. Since the perihelion distance of Mercury is regarding 0.31 astronomical unit (the aphelion distance is regarding 0.47 astronomical unit), it means that Mercury has approached and passed the sun as much as when it was closest to the sun.The heat-resistant shield of Solar Orbiter has the temperature when the sun is closest to it.About 500 degrees Celsius
Is said to have reached.
*… 1 astronomical unit (au) = approx. 150 million km, derived from the average distance from the sun to the earthAccording to ESA, the EUI of the Solar Orbiter, which is closer to the Sun than ever before as a “solar telescope”, isVery detailed image of the solar atmosphereI succeeded in getting.The image at the beginning is 4 days following the closest approach.March 30At 17nm wavelength using Solar Orbiter’s EUITaken with extreme ultraviolet light
[▲ Structure called “Hedgehog” (Credit: ESA & NASA / Solar Orbiter / EUI Team) taken by the extreme ultraviolet imager (EUI) of the solar spacecraft “Solar Orbiter”]
[▲ Structure called “Hedgehog” (Credit: ESA & NASA / Solar Orbiter / EUI Team) taken by the extreme ultraviolet imager (EUI) of the solar spacecraft “Solar Orbiter”]During this close-up observation, Solar Orbiter captured a structure that was of interest to researchers. This image, also taken on March 30th using EUI, is shown in the lower center of the structure.From researchers“Hedgehog”In this structure, nicknamedA number of hot and cold gases are lined up in a spike pattern
It’s called.Although hedgehog is classified as a relatively small structure, it is stillThe diameter is regarding 25,000km
There is also (regarding twice the size of the earth). The exact details of hedgehog, such as how it was formed in the solar atmosphere, are not yet known.The analysis of the observation data obtained by this close-up observation has just begun. The Belgian Royal Observatory, Senior Researcher at EUIDavid Berghmans
[▲ The image of the sun taken using the extreme ultraviolet image pickup device (EUI) of the solar spacecraft “Solar Orbiter” (Credit: ESA & NASA / Solar Orbiter / EUI Team)]
[▲ The image of the sun taken using the extreme ultraviolet image pickup device (EUI) of the solar spacecraft “Solar Orbiter” (Credit: ESA & NASA / Solar Orbiter / EUI Team)]Since the North and South Pole of the Sun are considered to be the key to unraveling the activity of the Sun, the Solar Orbiter conducts several swing-bys using the gravity of the planet to change the orbit and observe the polar region of the Sun. It is planned to enter a tilted orbit that can be made.The next close-up observation by Solar Orbiter will be on October 13, 2022.and,Approaching the sun up to 0.29 AU
intend to do something.
Source
Image Credit: ESA & NASA/Solar Orbiter/EUI Team
ESA – The Sun as you’ve never seen it before
Text/Matsumura Takehiro
Related article link (external site)
Glittering eyes in the jet-black universe. Hubble images celebrating Halloween in 2021 will be released
Einstein Ring discovered in 1987, the distance to the original celestial body turned out to be 10 billion light years
sorae
