Satellites Create First Ever Artificial Solar Eclipse — Allowing Scientists to Capture Rare Images of the Sun’s Corona

The European Space Agency’s Proba-3 mission has recently achieved a
triumph in space exploration
. The two spacecraft of the mission, the Coronagraph and the Occulter, flew in precise formation, 150 meters apart, to create the first artificial solar eclipses. Navigation and positioning technologies onboard the satellites maintained a perfect relative position, according to the
European Space Agency
. The degree of precision for the flying time and the maintained distance between the spacecraft and the Sun was not controlled from the ground. It allowed the 1.4-meter large disc of the Occulter spacecraft to cover the bright disc of the Sun for the Coronagraph spacecraft.

The overlap of the disks cast a shadow that measured 8 centimeters across onto the optical instrument, ASPIICS. When
one satellite blocked
the Sun, like the Moon, the other aimed its telescope at the corona, the Sun’s outer atmosphere that created a crown or halo of light. The meticulous degree of positioning was aided by autonomous GPS navigation, star trackers, lasers, and radio links, as per the
Associated Press
. The Proba-3 was a $210 million mission that produced 10 successful solar eclipses during the current checkout phase. The longest eclipse of the mission lasted for five hours, according to Andrei Zhukov of the Royal Observatory of Belgium.

Vmeetsolutions
noted that Zhukov was the lead scientist for the orbiting corona-observing telescope. The team aimed to achieve a total of six hours per eclipse, with the scientific observations beginning in July. The preliminary results showed the corona without being subjected to image processing. The images included the solar corona, which was a mystery due to its 10,000 degrees Fahrenheit temperature. It was the layer where the solar wind was generated, and the image would help understand its influence on space weather, as per
Space.com
. Alongside coronal mass ejections, the images capture features that were visible during total solar eclipses.

It was done by coronagraphs that blocked out direct light to study the coronal atmosphere, but the Earth’s atmosphere scattered this light. Hence, they worked better in space, recording data that helped track geomagnetic storms and auroras, as per
PBS News
. Previous satellites had generated imitation solar eclipses, but the sun-blocking disk and the corona-observing telescope were on the same spacecraft. This mission carried them separately, which forged a distance that helped look at the part of the corona closest to the limb of the sun. Zhukov hoped to
average two solar eclipses
per week, 200 in total, clocking at 1,000 hours during the two-year mission.

“It is exciting to see these stunning images validate our technologies in what is now the world’s first precision formation flying mission,” stated Dietmar Pilz, European Space Agency’s director of technology, engineering, and quality. The images from the Proba-3 mission would help to make a computer model of the Sun’s corona, according to
USA Today
. The European Space Agency’s Proba-3 mission was launched on a PSLV-XL rocket from India’s Satish Dhawan Space Centre on December 5, 2024. With the immense success of the first images, with precise quality and capture, the team hoped to continue the efforts to generate further reliable data.