Shining dust and solar magnetism
Another instrument, the
Solar and Heliospheric Imager (SoloHI), sent back shots of the
zodiacal light, which occurs when sunlight reflects off dust particles in our solar system. Although these images don’t signify a new discovery, taking them required SoloHI to tamp down the Sun’s glare to just a trillionth its actual brightness. By successfully completing the task, researchers are confident SoloHI can produce the image quality needed to study the solar wind (the instrument’s intended purpose) once the mission ramps up.
The
Polarimetric and Helioseismic Imager (PHI) also beamed back high-resolution data showing the Sun’s intricate and powerful magnetic field. And in a first, PHI revealed a view of a local magnetic field on the Sun that was not visible from Earth at the time, exemplifying just one advantage of the spacecraft’s intentionally tilted orbit.
The Sun’s magnetic field drives numerous internal processes, which can produce solar flares and other powerful outbursts. Such
energetic solar events can affect us here on Earth, too — from sparking stunning auroras to knocking out satellite communications and
earthbound power grids. But by monitoring the Sun with spacecraft such as Solar Orbiter and the Parker Solar Probe, scientists should be able to better predict when Earth-affecting space weather will occur.
All in all, these first results show that we still have much to learn about our home star, as well as the forces that power its frequently finicky behavior. “Solar Orbiter is off to an excellent start,” said project scientist Daniel Müller. “We are all really excited about these first images — but this is just the beginning.”