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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/markmccaughrean/statuses/114694089784936800">Mark McCaughrean (markmccaughrean@mastodon.social)'s status on Tuesday, 17-Jun-2025 02:30:26 JST</a><a href="https://mastodon.social/@markmccaughrean" title="markmccaughrean@mastodon.social"><img src="https://gnusocial.jp/avatar/40452-48-20221126151148.webp" width="48" height="48" alt="Mark McCaughrean" style="position: absolute; left: 0; top: 0;">Mark McCaughrean</a></section><article><p>Millions of degrees hot off the press – first results from ESA's PROBA-3 mission, using two spacecraft separated by 150 metres to create artificial solar eclipses.</p><p>This makes it possible to trace the solar corona close to the surface of the Sun on a routine basis, not just during actual eclipses.</p><p>Congratulations to the PROBA-3 team 👍</p><p>Image taken on 23 May 2025:<br>Inner yellow: PROBA-2 SWAP<br>Middle green: PROBA-3 ASPIICS<br>Outer red: SOHO LASCO C2</p><p><a href="https://mastodon.social/tags/SpaceScience" rel="tag">#SpaceScience</a> </p><p><a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse" rel="nofollow">https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/5210453#notice-10223305">In conversation</a><time datetime="2025-06-17T02:30:26+09:00" title="Tuesday, 17-Jun-2025 02:30:26 JST">about 3 months ago</time> <span>from <span><a href="https://mastodon.social/@markmccaughrean/114694089784936800" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@markmccaughrean/114694089784936800">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/4793175">A multi-coloured high-energy image of the Sun, comprising parts taken by three satellites, each sensitive to a different part of the Sun and its extended corona. The inner part shows the disk of the Sun in yellow; the middle part is green showing the inner corona; the outer part is reddish, showing the more distant corona.</a></label><br><a href="https://files.mastodon.social/media_attachments/files/114/694/080/864/686/383/original/00463536b0be20e7.jpg" rel="external">https://files.mastodon.social/media_attachments/files/114/694/080/864/686/383/original/00463536b0be20e7.jpg</a></li><li><article><header><div>Domain not in remote thumbnail source whitelist: www.esa.int</div><h5><a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse">Proba-3’s first artificial solar eclipse</a></h5><div></div></header><div>Today, the European Space Agency’s Proba-3 mission unveils its first images of the Sun’s outer atmosphere – the solar corona. The mission’s two satellites, able to fly as a single spacecraft thanks to a suite of onboard positioning technologies, have succeeded in creating their first ‘artificial total solar eclipse’ in orbit. The resulting coronal images demonstrate the potential of formation flying technologies, while delivering invaluable scientific data that will improve our understanding of the Sun and its enigmatic atmosphere.</div><footer></footer></article></li></ol></footer></blockquote>

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Mark McCaughrean (markmccaughrean@mastodon.social)'s status on Tuesday, 17-Jun-2025 02:30:26 JST Mark McCaughrean
Millions of degrees hot off the press – first results from ESA's PROBA-3 mission, using two spacecraft separated by 150 metres to create artificial solar eclipses.
This makes it possible to trace the solar corona close to the surface of the Sun on a routine basis, not just during actual eclipses.
Congratulations to the PROBA-3 team 👍
Image taken on 23 May 2025:
Inner yellow: PROBA-2 SWAP
Middle green: PROBA-3 ASPIICS
Outer red: SOHO LASCO C2
#SpaceScience
https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse
In conversationabout 3 months ago from mastodon.socialpermalink
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1. A multi-coloured high-energy image of the Sun, comprising parts taken by three satellites, each sensitive to a different part of the Sun and its extended corona. The inner part shows the disk of the Sun in yellow; the middle part is green showing the inner corona; the outer part is reddish, showing the more distant corona.
  https://files.mastodon.social/media_attachments/files/114/694/080/864/686/383/original/00463536b0be20e7.jpg
2. Domain not in remote thumbnail source whitelist: www.esa.int
  Proba-3’s first artificial solar eclipse
  Today, the European Space Agency’s Proba-3 mission unveils its first images of the Sun’s outer atmosphere – the solar corona. The mission’s two satellites, able to fly as a single spacecraft thanks to a suite of onboard positioning technologies, have succeeded in creating their first ‘artificial total solar eclipse’ in orbit. The resulting coronal images demonstrate the potential of formation flying technologies, while delivering invaluable scientific data that will improve our understanding of the Sun and its enigmatic atmosphere.

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