How a Simple Solar Orbiter "Hack" Unveiled the Sun's Hidden Atmosphere. Credit: Credit: Astronomy & Astrophysics (2023). DOI: 10.1051/0004-6361/202346039.

How a Simple Solar Orbiter “Hack” Unveiled the Sun’s Hidden Atmosphere

Last-Minute Camera 'Hack' Reveals Hidden Sun Wonders!


In an exciting turn of events, scientists have unveiled enhanced images of the sun’s elusive atmosphere using the Solar Orbiter’s EUI camera. This breakthrough, brought about by a clever ‘hack’ to the camera, promises to shape the design of future solar instruments.

Traditionally, capturing intricate details of the sun’s corona, the outermost layer of its atmosphere, was a challenge. However, the Solar Orbiter’s Extreme Ultraviolet Imager (EUI) has always aimed high. Thanks to a spur-of-the-moment modification to its safety door, the camera now delves deeper into this region than ever before.

“It was a quintessential hack,” explained Frédéric Auchère, a key member of the EUI team from the Université Paris-Sud. The ingenious modification? A lightweight protruding “thumb” affixed to the instrument’s door. This simple yet impactful adjustment lets EUI pick up faint ultraviolet light from the surrounding corona when the sun’s intense brightness is partially blocked.

Occulter Mode: The Game-Changer

Coined as the ‘occulter mode’, this innovation underwent rigorous testing since 2021. With successful results in hand, the team proudly showcased their findings in Astronomy & Astrophysics, alongside a captivating video demonstration.


When viewed, the imagery features an ultraviolet representation of the sun’s corona, supplemented with an image of the sun’s disk courtesy of NASA’s STEREO mission. By sheer coincidence, STEREO observed the sun nearly simultaneously with the Solar Orbiter, ensuring the surface features closely align with the atmospheric details.

Redefining Sun Imaging

While instruments like coronagraphs have previously captured the sun’s corona, this breakthrough method offers a dual-functioning instrument. Solar Orbiter’s coronagraph, known as Metis, demonstrates the significance of integrating both imaging capabilities into one device.

Daniel Müller, ESA’s project scientist for the Solar Orbiter, confidently stated, “This integration has been so efficient that we’re now envisioning a revolutionary instrument capable of capturing both the sun and its surrounding corona.”


The enhanced imaging from EUI’s occulter mode provides scientists an unprecedented look into the sun’s deeper atmosphere, a region typically obscured by traditional tools. As David Berghmans from the Royal Observatory of Belgium points out, “We’re on the verge of unveiling secrets previously hidden within this rarely observed region.”

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Written by Ivan Petricevic

I've been writing passionately about ancient civilizations, history, alien life, and various other subjects for more than eight years. You may have seen me appear on Discovery Channel's What On Earth series, History Channel's Ancient Aliens, and Gaia's Ancient Civilizations among others.

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