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#proba3

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UK<p><a href="https://www.europesays.com/uk/253309/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">europesays.com/uk/253309/</span><span class="invisible"></span></a> Total Solar Eclipses May Soon Last 48 Minutes, Scientists Say <a href="https://pubeurope.com/tags/ArtificialEclipses" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ArtificialEclipses</span></a> <a href="https://pubeurope.com/tags/corona" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>corona</span></a> <a href="https://pubeurope.com/tags/MESOM" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MESOM</span></a> <a href="https://pubeurope.com/tags/MullardSpaceLab" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MullardSpaceLab</span></a> <a href="https://pubeurope.com/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://pubeurope.com/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Science</span></a> <a href="https://pubeurope.com/tags/SolarEclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarEclipse</span></a> <a href="https://pubeurope.com/tags/SolarStorm" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarStorm</span></a> <a href="https://pubeurope.com/tags/SpaceWeather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SpaceWeather</span></a> <a href="https://pubeurope.com/tags/SurreySpaceCentre" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SurreySpaceCentre</span></a> <a href="https://pubeurope.com/tags/TotalSolarEclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TotalSolarEclipse</span></a> <a href="https://pubeurope.com/tags/UK" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UK</span></a> <a href="https://pubeurope.com/tags/UnitedKingdom" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UnitedKingdom</span></a></p>
Revesdespace<p>🛰️☀️🛰️ La mission <a href="https://universeodon.com/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> de l'ESA a réalisé sa première éclipse solaire artificielle sur orbite terrestre. Les premières images ont été publiées la semaine dernière.<br>Explications : <a href="https://reves-d-espace.com/proba-3-realise-sa-premiere-eclipse-solaire-artificielle-sur-orbite-terrestre/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">reves-d-espace.com/proba-3-rea</span><span class="invisible">lise-sa-premiere-eclipse-solaire-artificielle-sur-orbite-terrestre/</span></a></p>
Revesdespace<p>🛰️☀️🛰️ La mission <a href="https://universeodon.com/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> de l'ESA a réalisé sa première éclipse solaire artificielle sur orbite terrestre. Les premières images ont été publiées la semaine dernière.<br>Explications : <a href="https://reves-d-espace.com/proba-3-realise-sa-premiere-eclipse-solaire-artificielle-sur-orbite-terrestre/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">reves-d-espace.com/proba-3-rea</span><span class="invisible">lise-sa-premiere-eclipse-solaire-artificielle-sur-orbite-terrestre/</span></a></p>
Hacker News<p>Proba-3's first artificial solar eclipse</p><p><a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Enabling_Support/Space</span><span class="invisible">_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse</span></a></p><p><a href="https://mastodon.social/tags/HackerNews" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HackerNews</span></a> <a href="https://mastodon.social/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://mastodon.social/tags/ArtificialEclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ArtificialEclipse</span></a> <a href="https://mastodon.social/tags/SolarScience" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarScience</span></a> <a href="https://mastodon.social/tags/SpaceTechnology" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SpaceTechnology</span></a> <a href="https://mastodon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p>
Soh Kam Yung<p>"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."</p><p><a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Enabling_Support/Space</span><span class="invisible">_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse</span></a></p><p><a href="https://mstdn.io/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a> <a href="https://mstdn.io/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://mstdn.io/tags/Eclipses" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Eclipses</span></a> <a href="https://mstdn.io/tags/SolarEclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarEclipse</span></a> <a href="https://mstdn.io/tags/Satellites" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Satellites</span></a></p>
AlcorNews<p>Proba‑3 de l’ESA crée sa première éclipse solaire artificielle en orbite : deux satellites maintenus à 150 m, alignés avec précision millimétrique, pour observer la couronne solaire en continu.<br><a href="https://www.liberation.fr/sciences/espace/la-mission-proba-3-devoile-ses-premiers-rayons-de-soleil-20250617_GKYXTVGZYRGURP7JUW4B4QFGOA/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">liberation.fr/sciences/espace/</span><span class="invisible">la-mission-proba-3-devoile-ses-premiers-rayons-de-soleil-20250617_GKYXTVGZYRGURP7JUW4B4QFGOA/</span></a><br><a href="https://mastodon.social/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://mastodon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a> <a href="https://mastodon.social/tags/%C3%A9clipseartificielle" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>éclipseartificielle</span></a> <a href="https://mastodon.social/tags/couronneSolaire" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>couronneSolaire</span></a> <a href="https://mastodon.social/tags/astronomie" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomie</span></a></p>
Unofficial PetaPixel Bot<p>ESA Satellites Create First Artificial Total Solar Eclipse in Space <a href="https://petapixel.com/2025/06/17/esa-satellites-create-first-artificial-total-solar-eclipse-in-space/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">petapixel.com/2025/06/17/esa-s</span><span class="invisible">atellites-create-first-artificial-total-solar-eclipse-in-space/</span></a> <a href="https://toot.earth/tags/europeanspaceagency" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>europeanspaceagency</span></a> <a href="https://toot.earth/tags/proba3mission" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>proba3mission</span></a> <a href="https://toot.earth/tags/solareclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>solareclipse</span></a> <a href="https://toot.earth/tags/eclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>eclipse</span></a> <a href="https://toot.earth/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://toot.earth/tags/proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>proba3</span></a> <a href="https://toot.earth/tags/Space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Space</span></a> <a href="https://toot.earth/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://toot.earth/tags/News" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>News</span></a> <a href="https://toot.earth/tags/esa" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>esa</span></a> <a href="https://toot.earth/tags/sun" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sun</span></a></p>
MediaFaro News Digest<p>Two European satellites mimic a total solar eclipse as scientists aim to study its corona.</p><p>The satellites have created the first artificial solar eclipse by flying in precise formation, providing hours of on-demand totality for scientists.</p><p>Dubbed Proba-3, the €181 million mission has generated 10 successful solar eclipses so far.</p><p>ESA released the eclipse pictures at the Paris Air Show on Monday.</p><p><a href="https://mediafaro.org/article/20250616-two-european-satellites-mimic-a-total-solar-eclipse-as-scientists-aim-to-study-its-corona?mf_channel=mastodon&amp;action=forward" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">mediafaro.org/article/20250616</span><span class="invisible">-two-european-satellites-mimic-a-total-solar-eclipse-as-scientists-aim-to-study-its-corona?mf_channel=mastodon&amp;action=forward</span></a></p><p><a href="https://mastodon.mediafaro.org/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a> <a href="https://mastodon.mediafaro.org/tags/Space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Space</span></a> <a href="https://mastodon.mediafaro.org/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Science</span></a> <a href="https://mastodon.mediafaro.org/tags/Sun" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sun</span></a> <a href="https://mastodon.mediafaro.org/tags/SolarEclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarEclipse</span></a> <a href="https://mastodon.mediafaro.org/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://mastodon.mediafaro.org/tags/Coronagraph" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Coronagraph</span></a></p>
AlcorNews<p>Proba-3 de l’ESA a réalisé sa première éclipse solaire artificielle en orbite. Deux satellites alignés avec précision bloquent la lumière du Soleil pour étudier sa couronne, une avancée clé pour l’astronomie solaire.<br><a href="https://www.esa.int/Space_in_Member_States/France/Premiere_eclipse_solaire_artificielle_de_Proba-3" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Space_in_Member_States</span><span class="invisible">/France/Premiere_eclipse_solaire_artificielle_de_Proba-3</span></a><br><a href="https://mastodon.social/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://mastodon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a> <a href="https://mastodon.social/tags/%C3%A9clipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>éclipse</span></a> <a href="https://mastodon.social/tags/astronomie" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astronomie</span></a> <a href="https://mastodon.social/tags/espace" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>espace</span></a></p>
Royal Observatory of Belgium<p>📷 This is the image of the duo-satellite <a href="https://mastodon.social/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> 🛰️, the ☀️ solar <a href="https://mastodon.social/tags/eclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>eclipse</span></a> 🌑 maker, that was just released by the European Space Agency - ESA. <br>It was made by scientists of <span class="h-card" translate="no"><a href="https://mastodon.social/@ORB_KSB" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>ORB_KSB</span></a></span> <br>🤩 The beginning of a scientific voyage of discovery into the solar atmosphere, the birthplace of <a href="https://mastodon.social/tags/spaceweather" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>spaceweather</span></a>.<br>🔗 <a href="https://www.astro.oma.be/en/first-coronal-image-of-proba-3/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">astro.oma.be/en/first-coronal-</span><span class="invisible">image-of-proba-3/</span></a></p>
𝕒𝕓𝕕𝕖𝕣𝕘𝕠<p>Die ESA-Mission Proba-3 liefert erste künstliche Sonnenfinsternisse. Zwei Raumfahrzeuge fliegen 150 m auseinander, um die Sonnenscheibe zu verdecken und die Korona zu beobachten. Bilder zeigen ionisiertes Eisen, Helium und Protuberanzen. Alle 19,6 Stunden wird ein 6-stündiger „Kunst-Ksouf“ erzeugt – ein Durchbruch für die Sonnenforschung! <a href="https://mastodon.social/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://mastodon.social/tags/Sonnenfinsternis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sonnenfinsternis</span></a> <a href="https://mastodon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a></p><p>Trailblazing Satellite Mission Delivers Its First Artificial Solar Eclipse <br><a href="https://www.sciencealert.com/trailblazing-satellite-mission-delivers-its-first-artificial-solar-eclipse" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sciencealert.com/trailblazing-</span><span class="invisible">satellite-mission-delivers-its-first-artificial-solar-eclipse</span></a></p>
Poisaya<p>Proba-3’s first artificial solar eclipse</p><p><a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Enabling_Support/Space</span><span class="invisible">_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse</span></a> Via <span class="h-card" translate="no"><a href="https://feddit.nl/c/esa" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>esa</span></a></span> </p><p><a href="https://mastodon.online/tags/eclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>eclipse</span></a> <a href="https://mastodon.online/tags/solareclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>solareclipse</span></a> <a href="https://mastodon.online/tags/proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>proba3</span></a></p>
Poisaya<p>Première éclipse solaire artificielle de Proba-3</p><p><a href="https://www.esa.int/Space_in_Member_States/France/Premiere_eclipse_solaire_artificielle_de_Proba-3" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Space_in_Member_States</span><span class="invisible">/France/Premiere_eclipse_solaire_artificielle_de_Proba-3</span></a> Via <span class="h-card" translate="no"><a href="https://feddit.nl/c/esa" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>esa</span></a></span> </p><p><a href="https://mastodon.online/tags/eclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>eclipse</span></a> <a href="https://mastodon.online/tags/proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>proba3</span></a></p>
Daniel Fischer<p>The best artificial Total <a href="https://scicomm.xyz/tags/SolarEclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarEclipse</span></a> ever, delivered by ESA's <a href="https://scicomm.xyz/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> spacecraft duo of which one carries the telescope while the other plays Moon - this allows imaging the solar <a href="https://scicomm.xyz/tags/corona" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>corona</span></a> closer to the photosphere than any other coronagraph: <a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Enabling_Support/Space</span><span class="invisible">_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse</span></a></p>
Ricardo<p>First artificial solar eclipse in space | European Space Agency, ESA <br> <br><a href="https://youtu.be/nhke43NPO0A" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/nhke43NPO0A</span><span class="invisible"></span></a> <br> <br><a href="https://mastodon.social/tags/ESA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ESA</span></a> <a href="https://mastodon.social/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> <a href="https://mastodon.social/tags/Sun" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sun</span></a> <a href="https://mastodon.social/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Science</span></a></p>
DD3AH 📡📶 🏳️‍🌈🌐<p>Immer ein halbes Jahr auf die nächste <a href="https://social.darc.de/tags/Sonnenfinsternis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Sonnenfinsternis</span></a> warten ist ja so was von gestern 😜 </p><p><a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Enabling_Support/Space</span><span class="invisible">_Engineering_Technology/Proba-3/Proba-3_s_first_artificial_solar_eclipse</span></a> </p><p><a href="https://social.darc.de/tags/proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>proba3</span></a></p>
Daniel Fischer<p>Talk about unfortunate timing ... Andrei Zhukov wanted to discuss the first <a href="https://scicomm.xyz/tags/corona" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>corona</span></a> images from <a href="https://scicomm.xyz/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> at the Belgian <a href="https://scicomm.xyz/tags/SolarEclipse" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SolarEclipse</span></a> Conference - but the spacecrafts' commissioning took a bit longer than expected so the images are still embargoed. And will be released next Monday at around 14:30 UTC at Le Bourget - see <a href="https://www.esa.int/Newsroom/Press_Releases/ESA_Media_Invitation_Programme_for_the_2025_Paris_Air_Show_at_Le_Bourget" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Newsroom/Press_Release</span><span class="invisible">s/ESA_Media_Invitation_Programme_for_the_2025_Paris_Air_Show_at_Le_Bourget</span></a> for details - and online. 3/n</p>
Revesdespace<p>🛰️🛰️ L'ESA a annoncé avoir effectué le vol en formation de 2 satellites le plus précis au monde avec la mission <a href="https://universeodon.com/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> : maintien de leur position relative à moins d'un millimètre.<br>Vidéo : <a href="https://dlmultimedia.esa.int/download/public/videos/2025/05/009/2505_009_AR_EN.mp4" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dlmultimedia.esa.int/download/</span><span class="invisible">public/videos/2025/05/009/2505_009_AR_EN.mp4</span></a></p><p>Plus d'info : <a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3_achieves_precise_formation_flying" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Enabling_Support/Space</span><span class="invisible">_Engineering_Technology/Proba-3_achieves_precise_formation_flying</span></a></p><p>Mon article sur Proba-3 : <a href="https://reves-d-espace.com/proba-3-deux-satellites-esa-en-vol-en-formation-precis-pour-des-eclipses-solaires-artificielles/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">reves-d-espace.com/proba-3-deu</span><span class="invisible">x-satellites-esa-en-vol-en-formation-precis-pour-des-eclipses-solaires-artificielles/</span></a></p>
Revesdespace<p>🛰️🛰️ Lors du premier vol autonome en formation de la mission <a href="https://universeodon.com/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> de l'ESA, le satellite « Coronagraph » a été photographié par la caméra embarquée du satellite « Occulter »</p>
Daniel Fischer<p>The Coronagraph spacecraft of the <a href="https://scicomm.xyz/tags/Proba3" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Proba3</span></a> project captured by a camera onboard the Occulter spacecraft during the mission's first autonomous formation acquisition - both spacecraft maintained their relative position for several hours without any control from the ground: <a href="https://www.esa.int/Enabling_Support/Space_Engineering_Technology/Proba-3/Proba-3_s_first_autonomous_formation_flight" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Enabling_Support/Space</span><span class="invisible">_Engineering_Technology/Proba-3/Proba-3_s_first_autonomous_formation_flight</span></a></p>