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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://fosstodon.org/users/AkaSci/statuses/114695504912437186">AkaSci 🛰️ (akasci@fosstodon.org)'s status on Tuesday, 17-Jun-2025 09:34:00 JST</a><a href="https://fosstodon.org/@AkaSci" title="akasci@fosstodon.org"><img src="https://gnusocial.jp/avatar/20805-48-20221219024513.webp" width="48" height="48" alt="AkaSci 🛰️" style="position: absolute; left: 0; top: 0;">AkaSci 🛰️</a></section><article><p>Here are the first test images of the Sun’s Corona taken by the ESA Proba-3 mission.</p><p>The images (one in visible light, the other in light emitted by iron atoms w/o half their electrons) were taken by the twin Proba-3 spacecraft, flying 150 m apart to create artificial total solar eclipses using the 1.4 m disc on the Occulter spacecraft.</p><p>Still in commissioning phase, Proba-3 requires ground control for precision flying.</p><p>Next: Autonomous flying and 6 hour eclipses!</p><p><a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse" rel="nofollow noreferrer">https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse</a><br>1/n</p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/5212272#notice-10226920">In conversation</a><time datetime="2025-06-17T09:34:00+09:00" title="Tuesday, 17-Jun-2025 09:34:00 JST">about 8 days ago</time> <span>from <span><a href="https://fosstodon.org/@AkaSci/114695504912437186" rel="external" title="Sent from fosstodon.org via ActivityPub">fosstodon.org</a></span></span><a href="https://fosstodon.org/@AkaSci/114695504912437186">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/4795109">1. Image of the Sun during an artificial solar eclipse. Against a black background, the Sun’s bright body is covered by a black disc, and light green hair-like tendrils extend from the black disc in all directions. Brighter green light peeks from behind the black disc’s edge, slowly fading towards the outer edges of the image.This image, captured in the visible light spectrum, shows the solar corona similarly to how a human eye would see it during an eclipse through a green filter. The hair-like structures were revealed using a specialised image processing algorithm.CREDIT: ESA/Proba-3/ASPIICS/WOW algorithm2. Image of the Sun taken during an artificial solar eclipse. Against a black background, the Sun’s bright body is covered by a black disc, and blue-green hair-like tendrils extend from the black disc in all directions. Brighter green light peeks from behind the black disc’s edge, slowly fading towards the outer edges of the image.This image shows observations in the coronal green line – a spectral line emitted by iron atoms that lost half of their electrons due to extremely high temperatures. This allows us to see the hottest contents of the corona, at up to 2 million degrees. On the upper left side, a hot loop can be seen extending from the Sun’s surface into the corona, a structure which generally appears following a solar flare.CREDIT: ESA/Proba-3/ASPIICS</a></label><br><a href="https://cdn.fosstodon.org/media_attachments/files/114/695/480/990/659/072/original/a4f1e78656b1b34b.png" rel="external">https://cdn.fosstodon.org/media_attachments/files/114/695/480/990/659/072/original/a4f1e78656b1b34b.png</a></li></ol></footer></blockquote>

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AkaSci 🛰️ (akasci@fosstodon.org)'s status on Tuesday, 17-Jun-2025 09:34:00 JST AkaSci 🛰️
Here are the first test images of the Sun’s Corona taken by the ESA Proba-3 mission.
The images (one in visible light, the other in light emitted by iron atoms w/o half their electrons) were taken by the twin Proba-3 spacecraft, flying 150 m apart to create artificial total solar eclipses using the 1.4 m disc on the Occulter spacecraft.
Still in commissioning phase, Proba-3 requires ground control for precision flying.
Next: Autonomous flying and 6 hour eclipses!
https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse
1/n
In conversationabout 8 days ago from fosstodon.orgpermalink
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1. 1. Image of the Sun during an artificial solar eclipse. Against a black background, the Sun’s bright body is covered by a black disc, and light green hair-like tendrils extend from the black disc in all directions. Brighter green light peeks from behind the black disc’s edge, slowly fading towards the outer edges of the image. This image, captured in the visible light spectrum, shows the solar corona similarly to how a human eye would see it during an eclipse through a green filter. The hair-like structures were revealed using a specialised image processing algorithm. CREDIT: ESA/Proba-3/ASPIICS/WOW algorithm 2. Image of the Sun taken during an artificial solar eclipse. Against a black background, the Sun’s bright body is covered by a black disc, and blue-green hair-like tendrils extend from the black disc in all directions. Brighter green light peeks from behind the black disc’s edge, slowly fading towards the outer edges of the image. This image shows observations in the coronal green line – a spectral line emitted by iron atoms that lost half of their electrons due to extremely high temperatures. This allows us to see the hottest contents of the corona, at up to 2 million degrees. On the upper left side, a hot loop can be seen extending from the Sun’s surface into the corona, a structure which generally appears following a solar flare. CREDIT: ESA/Proba-3/ASPIICS
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