The Solar Orbiter,a joint mission by the European space Agency (ESA) and NASA,has provided scientists with an unprecedented look at the Sun’s south pole. Launched in 2020 from Cape canaveral, florida, the probe’s unique orbit has allowed it to capture images and data previously unattainable from Earth-based observatories.

Several European companies contributed to the mission, including Enbio, an Irish firm that developed a protective coating for the spacecraft using crushed animal bones. this unusual material shields the orbiter from the Sun’s extreme heat and radiation, enabling it to fly closer to the Sun than any previous probe.

Prior to the Solar Orbiter, all solar images were taken from the ecliptic plane, the orbital path of Earth and its satellites, which prevented direct observation of the poles. The Solar orbiter altered its trajectory by performing flybys of Venus and Earth,using their gravitational pull to propel itself into a new solar orbit.

In March, the spacecraft reached a viewing angle of 17° below the solar equator, capturing images using instruments that observe visible, ultraviolet, and extreme ultraviolet light. This extensive data provides a multi-faceted view of the Sun’s unexplored regions.

These new perspectives could revolutionize our understanding of the Sun’s magnetic field and its activity cycle. Scientists hope to gain insights into the origins of solar storms, which can disrupt satellites, power grids, and dialog systems on Earth.

According to Professor Carole Mundell, ESA’s director of science, the mission marks a “new era” for solar science.

A Magnetic Anomaly

The Solar Orbiter’s data indicates that the Sun’s magnetic south pole is in a state of flux, exhibiting a mix of north and south magnetic fields, unlike Earth’s more uniform magnetic field. This chaotic state is typical of the Sun’s 11-year activity cycle,during which its magnetic field reverses.

The spacecraft also observed the movement of solar particles above the south pole, revealing swirling flows of hot plasma that suggest the presence of polar vortices in the Sun’s atmosphere. These previously unseen dynamics may offer clues about the workings of the sun’s magnetic field and the solar wind.

“The Sun is our nearest star, giver of life, and potential disruptor of modern space and ground power systems, so it is imperative that we understand how it works and learn to predict its behavior.”
– Professor Carole Mundell, ESA

Active Space Technologies, a Portuguese company, developed precision feedthroughs that allow UV light to enter the spacecraft’s instruments without overheating them. Critical Software, another Portuguese firm, provided the probe’s diagnostics and onboard software. Captec, an Irish software startup, contributed software verification and validation for the probe’s flight software.

This advanced technology has enabled unprecedented views of the Sun, and even more detailed observations are expected in the coming years. The Solar Orbiter will continue to adjust its orbit, eventually reaching 33° above the solar equator, providing an even greater understanding of the Sun’s characteristics.