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<!DOCTYPE html><html lang="en-us" data-reactroot=""><head><title>The Rosetta Spacecraft Ends Its Mission as It Flings Itself Into a Comet | WIRED</title><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" value="IE=edge"><meta name="msapplication-tap-highlight" value="no"><meta name="viewport" value="width=device-width, initial-scale=1"><meta name="author" value="Emma Grey Ellis"><meta name="copyright" value="Copyright (c) Condé Nast 2021"><meta name="description" value="Time to break out the tissues, space fans."><meta name="id" value="2093271"><meta name="keywords" value="science,asteroids,esa,philae,rosetta,space,web"><meta name="news_keywords" value="science,asteroids,esa,philae,rosetta,space,web"><meta name="robots" value="index, follow, max-image-preview:large"><meta name="content-type" value="article"><meta name="parsely-post-id" value="2093271"><meta name="parsely-metadata" value="{"description":"Time to break out the tissues, space fans.","image-16-9":"https://media.wired.com/photos/5926b676af95806129f50602/16:9/w_1000,c_limit/Rosetta_impact-1.jpg","image-1-1":"https://media.wired.com/photos/5926b676af95806129f50602/1:1/w_1000,c_limit/Rosetta_impact-1.jpg"}"><meta value="Time to break out the tissues, space fans." name="og:description"><meta value="https://media.wired.com/photos/5926b676af95806129f50602/191:100/w_1280,c_limit/Rosetta_impact-1.jpg" name="og:image"><meta value="Wired" name="og:site_name"><meta value="An Ode to the Rosetta Spacecraft As It Plummets To Its Death" name="og:title"><meta value="article" name="og:type"><meta value="https://www.wired.com/2016/09/ode-rosetta-spacecraft-going-die-comet/" name="og:url"><meta value="metered" name="article:content_tier"><meta value="false" name="article:opinion"><meta http-equiv="content-language" value="en-us"><meta value="summary_large_image" name="twitter:card"><meta value="@wired" name="twitter:creator"><meta value="Time to break out the tissues, space fans." name="twitter:description"><meta value="https://www.wired.com" name="twitter:domain"><meta value="https://media.wired.com/photos/5926b676af95806129f50602/191:100/w_1280,c_limit/Rosetta_impact-1.jpg?mbid=social_retweet" name="twitter:image:src"><meta value="@wired" name="twitter:site"><meta value="An Ode to the Rosetta Spacecraft As It Plummets To Its Death" name="twitter:title"><meta value="719405864858490" name="fb:app_id"><meta value="19440638720" name="fb:pages"><link rel="canonical" href="https://www.wired.com/2016/09/ode-rosetta-spacecraft-going-die-comet/"><link rel="stylesheet" href="https://www.wired.com/verso/static/wired/styles.min.css"><link rel="shortcut icon" href="https://www.wired.com/verso/static/wired/assets/favicon.ico" type="image/x-icon"><link rel="amphtml" href="https://www.wired.com/2016/09/ode-rosetta-spacecraft-going-die-comet/amp"><link rel="preload" href="https://cdn.cookielaw.org/scripttemplates/otSDKStub.js" as="script"><link rel="preload" href="https://cdn.cookielaw.org/opt-out/otCCPAiab.js" as="script">
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link__last-letter-spacing">s</span></a></span></span></p></div><div class="content-header__rubric-date-block"><div class="sc-gIvpCV hIfpZg rubric content-header__rubric rubric-vertical-align"><a class="sc-dFRpvv bOKKlV rubric__link" href="https://www.wired.com/category/science"><span class="sc-csTaMs dugqNO">Science</span></a></div><time class="content-header__publish-date content-header__title-block-publish-date" data-testid="ContentHeaderPublishDate">09.30.2016 07:00 AM</time></div></div><h1 class="content-header__row content-header__hed" data-testid="ContentHeaderHed">An Ode to the Rosetta Spacecraft as It Flings Itself Into a Comet</h1></div><div class="content-header__row content-header__accreditation"><div class="content-header__row content-header__dek">Time to break out the tissues, space fans.</div><div class="social-icons social-icons--standard content-header__row content-header__social-share social-links-left-layout social-share-hide-on-desktop"><ul 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hzGuaV"></div><div class="sc-iCoHVE sc-fujyUd sc-fKgIGh jChTxA bMsqET fafMvM"><span class="sc-kfYqjs jpcbJh"><p>To revist this article, visit My Profile, then <a href="https://www.wired.com/account/saved">View saved stories</a>.</p></span></div></div></ul></div></div><div class="sc-kYQaHc gQtfxQ"></div></div></aside></header></div><div class="content-background" data-attribute-verso-pattern="article-body"><div class=""><div class="article__chunks"><div class="grid grid-margins grid-items-2 grid-layout--adrail narrow wide-adrail"><div class="grid--item body body__container article__body grid-layout__content"><p><span class="lead-in-text-callout">Today, the European</span> Space Agency's Rosetta spacecraft will engage its thrusters for one final maneuver: a suicidal plunge toward the comet it has been orbiting for two years and chasing for a decade. After Rosetta collides with comet 67P/Churyumov-Gerasimenko, its systems will go dark. Scientists will never hear from it again. And eventually, as Chury's repeated treks around the Sun slowly evaporate the cosmic snowball's icy surface, Rosetta's body will completely disappear beneath the comet's gathering dust. </p><p>People are getting real weepy about it.</p><p>Is that kind of nuts? Sure. Rosetta is an aluminum box. Nobody laments the demise of their toaster. But for something that's not even three meters long (not counting those giant 32-meter solar panels), Rosetta and its even tinier companion, the <a href="https://www.wired.com/2016/09/can-find-philae-lander-hiding-surface-comet/">Philae lander</a>, have had an outsized impact. They had mesospherically high scientifically stakes, a soap operatic journey, and weird, anthropomorphic social media presences. So, as geeky as it is to pour emotion into a scientific instrument ... we're going to miss Rosetta.</p><div role="heading" aria-level="3" class="heading-h3">A History of Firsts</div><p>Before this mission, no spacecraft had ever rendezvoused with a comet—let alone landed on one. There are a million reasons why that's tricky to do, but for simplicity's sake: Have you ever tried to hit a moving object by throwing something at it? Hard, no? And Rosetta had to meet up with Chury at just the right speed—slow enough to get caught up in its gravity and avoid faceplanting on the surface.</p><div class="ad ad--in-content"><div class="ad__slot ad__slot--in-content"></div></div><p>After launching in 2004, Rosetta had to whip around the inner solar system for years, repeatedly slingshotting off of Earth and Mars' gravity to get its trajectory right. "We had ambitious goals," says Rosetta's former mission manager Gerhard Schwehm, who has been involved with the mission for over 30 years. "People said we were crazy." To add to the pressure, Rosetta had to go into hibernation from June 2011 until January 2014 while it waited for Chury to get into the right spot. After sleeping for so long—it being so flipping cold hundreds of millions of miles from the Sun—Rosetta's team was genuinely concerned it might never switch back on.</p><div class="consumer-marketing-unit consumer-marketing-unit--article-mid-content consumer-marketing-unit--no-failsafe" role="presentation" aria-hidden="true"><div class="consumer-marketing-unit__slot consumer-marketing-unit__slot--article-mid-content consumer-marketing-unit__slot--in-content"></div><div class="journey-unit"></div></div><p>For many close to Rosetta, the emotional flashpoint was that wakeup, rather than Rosetta's rendezvous with Chury. “When the signal was 18 minutes late—relative to all the guesses of people who’d worked on the mission for ten years—it was seriously distressing," says McCaughrean. "But then it came, and it was euphoria. You knew finally you had a mission.”</p><div data-attr-viewport-monitor="inline-recirc" class="inline-recirc-wrapper inline-recirc-observer-target-1 viewport-monitor-anchor"></div><p>People outside ESA caught the Rosetta bug as well. There are <a class="external-link" data-event-click="{"element":"ExternalLink","outgoingURL":"https://www.youtube.com/watch?v=nDzmJuXAgD8"}" href="https://www.youtube.com/watch?v=nDzmJuXAgD8" rel="nofollow noopener" target="_blank">songs</a> about it, and hundreds of videos of people who have jobs and other things to do screaming "Wake up, Rosetta!" to an inanimate object in deep space. Rosetta's fans have stayed with the mission through the wakeup, the successful rendezvous, the Philae's launch and <a href="https://www.wired.com/2014/11/rosetta-philae-comet-landing-success/">disastrously bumpy landing</a>, and its <a href="https://www.wired.com/2015/06/philae-possibly-spotted/">sudden communication</a> and <a href="https://www.wired.com/2016/09/can-find-philae-lander-hiding-surface-comet/">eventual re-discovery</a>. And now, to the bitter end: <a class="external-link" data-event-click="{"element":"ExternalLink","outgoingURL":"https://twitter.com/hashtag/CometLanding?src=hash"}" href="https://twitter.com/hashtag/CometLanding?src=hash" rel="nofollow noopener" target="_blank">#CometLanding</a>.</p><p>“The public’s engagement has been quite amazing," Mark McCaughrean, senior science advisor for ESA. "There’s nobody eating sandwiches on Rosetta, but the mission has very human concerns: water and life." That's at least partially due to the mission's unconventional social media campaign, which cast Rosetta and Philae as chatty, bantering traveling companions.</p><div aria-label="social media post" class="sc-JsfGe dzcLqc"><blockquote class="sc-gGGEav XtWek twitter-tweet" lang="en" data-type="twitter" data-url="https://twitter.com/Philae2014/status/532451193537445888"><a href="https://twitter.com/Philae2014/status/532451193537445888" class="sc-dksuAk kpjVcu">https://twitter.com/Philae2014/status/532451193537445888</a></blockquote></div><div aria-label="social media post" class="sc-JsfGe dzcLqc"><blockquote class="sc-gGGEav XtWek twitter-tweet" lang="en" data-type="twitter" data-url="https://twitter.com/ESA\_Rosetta/status/532496644231942144"><a href="https://twitter.com/ESA/_Rosetta/status/532496644231942144" class="sc-dksuAk kpjVcu">https://twitter.com/ESA\_Rosetta/status/532496644231942144</a></blockquote></div><p>But for McCaughrean, it was important that the anthropomorphizing didn't drown out the science—it was for drawing people in, and keeping them invested. "I think we’ve redressed the balance about people’s short attention span and need for instant gratification," he says. "And that’s important. You can’t just go to Mars today because <a href="https://www.wired.com/2016/09/elon-musk-colonize-mars/">Elon says you can go</a>. You’ve got to be in it for the long haul.”</p><div role="heading" aria-level="3" class="heading-h3">A Future of Firsts</div><p>Rosetta's long haul is ending, but it has proved the value of extended space exploration at every point of its journey. “Learning how to fly around the comet was a masterpiece of spaceflight,” says Andrea Accomazzo, head of ESA’s solar and planetary missions division, and flight director for Rosetta. When Rosetta arrived at Chury, Accomazzo's team was flying blind. They had to infer the mass of the comet—and the velocity Rosetta needed to maintain to stay in orbit—by measuring how much the comet was perturbing Rosetta’s trajectory. Rosetta's team at ESA shared everything they learned with their collaborators at NASA's Jet Propulsion Laboratory, who had taught them interplanetary flight in previous years. It's all pretty kumbaya.</p><div class="cne-interlude-embed"></div><p>Which seems about right, given that Rosetta's mission is uncovering clues to humanity's history. Rosetta and Philae collected molecular oxygen that had been trapped in the ice for billions of years, which suggests that the comet must have formed someplace cold and distant, far from active stirring by larger bodies. And as for life's origins, they found carbon and hydrogen and nitrogen as well—and even the simplest amino acid, glycine. "There’s just a whole primordial soup of stuff," says McCaughrean.</p><p>But while the mission has been long, it is far from complete. Rosetta has been collecting data for two years, and scientists have analyzed only a fraction of it. And they'll get more even as Accomazzo's team pilots the craft to its final resting place. "The mission for me is all the science data that was collected," says Accomazzo, "and it's a good feeling that scientists will use them for ages."</p><p>But for now, pulling the plug on Rosetta is a difficult job. “There will be a piece of our lives that is gone," says Accomazzo. "After the landing we do have a party—otherwise it would be too depressing.” And Accomazzo is far from alone in being emotional.</p><p>Even with the distance of retirement, Schwehm compared the end of Rosetta's transmissions to a flatlining heart monitor. “We’ll never have that closure with Rosetta like we did with Philae because there’s nothing out there to take a picture,” says McCaughrean. 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