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Delhi News Daily > Blog > Technology > Two Spacecraft Recreate Artificial Solar Eclipses to Observe the Sun’s Superhot Corona – Delhi News Daily
Technology

Two Spacecraft Recreate Artificial Solar Eclipses to Observe the Sun’s Superhot Corona – Delhi News Daily

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Last updated: June 29, 2025 2:24 am
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Two Spacecraft Recreate Artificial Solar Eclipses to Observe the Sun’s Superhot Corona
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Two spacecraft have achieved a rare milestone: recreating a total solar eclipse in space. The European Space Agency’s (ESA) Proba-3 mission released the first images on June 16 from a successful test where one satellite blocked the sun’s light, allowing the other to capture the blazing outer atmosphere—the corona. Unlike fleeting eclipses on Earth, this artificial version offers prolonged, repeated observations. “We could see the corona without any special image processing,” said Andrei Zhukov of the Royal Observatory of Belgium. “It was just visible there, like during a natural total solar eclipse.”

ESA’s Proba-3 Spacecraft Recreates Eclipses to Study Sun’s Million-Degree Corona in Unprecedented Detail

As per ESA reports, the Proba-3 spacecraft orbits Earth in an elliptical path, up to 60,000 kilometres at the far end. During alignment, they float a mere 150 metres apart, one satellite casting an accurate shadow on the other. This method allows scientists to block the sun’s brightly radiant disk and view the faint, million-degree corona, which is some 200 times hotter than the sun’s visible surface and can be observed only during total eclipses. The middle layer is where scientists think answers to why this outer region is so blisteringly hot may be found.

So far, the twin satellites have completed nine test eclipses, with the goal of performing two per week. While natural eclipses only happen every 18 months or so and last just a matter of minutes, Proba-3 could replicate an eclipse every 20 hours and prolong it for up to six hours. This capability gives scientists a unique opportunity to investigate in detail the solar corona’s dynamic and magnetic activity.

Proba-3 was lifted off to orbit from India on December 5. Over the next two years, the spacecraft is anticipated to provide upwards of 1,000 hours of eclipse data. The discovery not only makes it possible to systematically observe solar behavior but also helps to enhance the forecasts of solar weather needed to protect satellites and power grids.

ESA officials view this as a new era in heliophysics, where man-made eclipses will fill the observational gap left by the rarity of total solar eclipses on Earth. With each orbit and eclipse, scientists inch closer to solving the long-standing mysteries of our star’s fiery halo.



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