{"id":23520,"date":"2026-05-18T17:30:55","date_gmt":"2026-05-18T09:30:55","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/vega-c-launches-smile-to-study-earths-magnetosphere\/"},"modified":"2026-07-21T10:59:20","modified_gmt":"2026-07-21T02:59:20","slug":"vega-c-launches-smile-to-study-earths-magnetosphere","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/vega-c-launches-smile-to-study-earths-magnetosphere\/","title":{"rendered":"Vega C launches SMILE to study Earth\u2019s magnetosphere"},"content":{"rendered":"<p>The European Space Agency\u2019s (ESA) latest science mission, Solar Wind Magnetosphere Ionosphere Link Explorer (SMILE), launched on a four-stage Vega C rocket from French Guiana on Tuesday morning. SMILE, a collaboration between ESA, the Chinese Academy of Sciences (CAS), and multiple academic and commercial organizations, will capture the first global soft X-ray images of Earth\u2019s magnetosphere and its response to powerful solar wind.<\/p>\n<p>Vega C successfully launched on a northward trajectory to a highly inclined 73-degree orbit from the Ensemble de Lancement Vega (ELV) at the Guiana Space Centre in Kourou, French Guiana, at 03:52 UTC on Tuesday, May 19. Vega C\u2019s manufacturer, Avio, delayed the launch from April 9 due to a technical problem on the component production line after integrating the VV29 vehicle with its payload.<\/p>\n<\/p>\n<p>This was Vega C\u2019s first launch with Avio as the provider, replacing Arianespace, which previously operated the vehicle. Airbus in Madrid developed the payload module, while CAS delivered the spacecraft\u2019s power, attitude control, and propulsion module.<\/p>\n<p>The rocket\u2019s first stage, a single P120C solid-fuel motor, has a maximum thrust of 4,323 kN. The single-piece solid-fuel rocket motor is the largest and most powerful ever developed, a title previously held by the P80FW motor used on the original Vega vehicle. Arianespace\u2019s Ariane 6 vehicle also uses the P120C as strap-on boosters in either a two-booster or four-booster configuration.<\/p>\n<\/p>\n<p><iframe title=\"ESA's Smile mission launch (Official broadcast)\" src=\"https:\/\/www.youtube.com\/embed\/6q8aKbcKCOs?list=PLbyvawxScNbtsnSuZ3HfutR9QkPTjLHKG\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"\" name=\"fitvid0\" data-gtm-yt-inspected-14=\"true\" data-gtm-yt-inspected-21=\"true\"><\/iframe><\/p>\n<p>The second and third stages of Vega C utilize the Avio-developed Zefiro 40 and Zefiro 9 solid rocket motors, respectively. Both motors use powder aluminum, ammonium perchlorate, and hydroxyl-terminated polybutadiene as propellants.<\/p>\n<p>The Attitude Vernier Upper Module (AVUM) serves as the rocket\u2019s fourth stage and is the only liquid-propellant stage. Developed by Avio, the upper stage is capable of multiple restarts and is designed to place payloads into precise orbits and to perform roll and attitude control. Powered by an RD-843 rocket engine, the stage uses unsymmetrical dimethylhydrazine fuel and dinitrogen tetroxide oxidizer as its propellants.<\/p>\n<p>Space Technology<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>Geographic Reference<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>Earth\u2019s<path d=\"M7.59009 18.59L9.00009 20L17.0001 12L9.00009 4L7.59009 5.41L14.1701 12\" style=\"animation: initial !important; background: initial !important; border: 0px !important; box-shadow: none !important; color: inherit !important; cursor: inherit !important; direction: inherit !important; display: inline !important; fill: currentcolor !important; filter: initial !important; float: none !important; margin: 0px !important; opacity: initial !important; outline: 0px !important; overflow: initial !important; padding: 0px !important; stroke: initial !important; transform: initial !important; vertical-align: initial !important; visibility: inherit !important;\"><\/path>\n<p>     (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<p>Vega C deployed SMILE to a circular low-Earth orbit at 700 km altitude, after which the spacecraft\u2019s propulsion module will bring it to its science orbit using eleven engine burns. The SMILE spacecraft has one 490 N engine and carries 1580 kg of propellant. SMILE has two deployable solar arrays and 12 thrusters for attitude control.<\/p>\n<p>Earth\u2019s only defense against powerful space weather is its magnetosphere, an invisible region of space dominated by Earth\u2019s magnetic field lines. The Sun constantly emits immense amounts of radiation, and often this radiation becomes solar wind that interacts with Earth\u2019s magnetosphere.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-113397\" class=\"size-full wp-image-113397\" src=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3986-e1779050973470.jpeg\" alt=\"\" width=\"1290\" height=\"808\" srcset=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3986-e1779050973470.jpeg 1290w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3986-e1779050973470-350x219.jpeg 350w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3986-e1779050973470-559x350.jpeg 559w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3986-e1779050973470-768x481.jpeg 768w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3986-e1779050973470-1170x733.jpeg 1170w\" sizes=\"(max-width: 1290px) 100vw, 1290px\"><\/p>\n<p id=\"caption-attachment-113397\" class=\"wp-caption-text\">SMILE, encapsulated in Vega C fairings, travels to the launch site for payload integration. (Credit: ESA)<\/p>\n<p>SMILE, a 2,300 kg spacecraft, will focus on how Earth responds to the solar wind through the use of four scientific instruments. The spacecraft aims to answer three fundamental questions. First, what happens where the solar wind meets Earth\u2019s magnetic shield? Second, what causes magnetic \u201cglitches\u201d on the dark side of Earth? And lastly, how can we predict the most dangerous magnetic storms earlier?<\/p>\n<p>SMILE will be the first vehicle to make detailed, long-duration X-ray observations of Earth\u2019s magnetic field and to image the northern lights \u2014 produced by charged particles interacting with Earth\u2019s magnetosphere \u2014 for 45 hours at a time. To observe Earth\u2019s magnetosphere for 45 hours per orbit, a highly elliptical orbit is required. SMILE will reach 121,000 km above the North Pole at apogee, a third of the distance to the Moon. When the vehicle is at its 5,000 km perigee above the South Pole, it will transmit its science data to the O\u2019Higgins Antarctic ground station.<\/p>\n<p>The largest instrument on the spacecraft is the Soft X-ray Imager (SXI), developed by the University of Leicester in collaboration with the U.K. Space Agency (UKSA) and ESA. SXI will detect X-rays produced when heavy ions in the solar wind collide with neutral particles in Earth\u2019s exosphere, a process known as solar wind charge exchange (SWCX). The results will yield the first global X-ray images of Earth\u2019s magnetosphere. The wide-field lobster-eye telescope utilizes micropore optics (MPO) to spectrally map the location, shape, and motion of Earth\u2019s magnetospheric bow shock, polar cusps, and magnetopause, which are constantly changing due to interaction with the solar wind.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-113405\" class=\"size-full wp-image-113405\" src=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765.png\" alt=\"\" width=\"1290\" height=\"853\" srcset=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765.png 1290w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765-350x231.png 350w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765-529x350.png 529w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765-768x508.png 768w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765-1170x774.png 1170w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765-780x516.png 780w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3765-263x175.png 263w\" sizes=\"(max-width: 1290px) 100vw, 1290px\"><\/p>\n<p id=\"caption-attachment-113405\" class=\"wp-caption-text\">Technicians working on the SXI instrument for SMILE before its integration. (Credit: Space Park Leicester)<\/p>\n<p>\u201cGlobal models for the solar wind\u2019s interaction with the magnetosphere tell us where the emissions should occur,\u201d Dr. Steven Sembay, principal investigator of SXI, explained to NSF during an interview. \u201cSince the solar wind cannot enter the magnetosphere, we expect the magnetopause to appear as a sharp boundary between strong emissions outside the magnetopause and weak emissions inside.\u201d<\/p>\n<\/p>\n<h4 class=\"widget-title penci-border-arrow\">See Also<\/h4>\n<ul>\n<li>SMILE Updates<\/li>\n<li>ESA Forum<\/li>\n<li>NSF Shop<\/li>\n<li>Click here to Join L2<\/li>\n<\/ul>\n<p>\u201cWe are excited to learn just how strong the emissions will be, when and how rapidly the magnetopause will move in response to changes in solar wind pressure and\/or the strength and direction of the interplanetary magnetic field. We are equally excited to work with the other instrument teams on SMILE to construct a global view of the dynamic magnetosphere and improve our understanding of space weather in our immediate environment.\u201d<\/p>\n<p>The telescope is equipped with the two largest X-ray-sensitive charge-coupled devices (CCDs) ever flown to space. These CCDs require temperatures of -120 degrees Celsius to minimize noise and are equipped with a radiation-shutter door that protects them during their passage through the Van Allen radiation belts.<\/p>\n<p>\u201cDue to resource constraints on available power, we had to design a passive cooling system and a structural design [for the CCDs] that thermally isolates the detector plane from the heat flow from the rest of the spacecraft,\u201d Dr. Sembay explained. \u201cBecause of the relatively large aperture of the telescope and due to the micropore optic array necessary to achieve the wide field of view, it is not possible to passively shield the detectors against radiation damage to the same extent as contemporary X-ray telescopes used in astrophysics, which have much narrower fields of view.\u201d<\/p>\n<\/p>\n<p><iframe title=\"Smile's journey from launch to orbit\" src=\"https:\/\/www.youtube.com\/embed\/cLnV9Ae8aGY?list=PLbyvawxScNbtsnSuZ3HfutR9QkPTjLHKG\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"\" name=\"fitvid1\" data-gtm-yt-inspected-14=\"true\" data-gtm-yt-inspected-21=\"true\"><\/iframe><\/p>\n<p>\u201cMitigation against radiation damage comes in the form of having a mechanical shutter which protects the CCDs when the spacecraft passes through the Earth\u2019s radiation belts and within the design of the CCDs themselves.\u201d<\/p>\n<p>Another key instrument on SMILE is the Ultraviolet Imager (UVI), developed by China\u2019s National Space Science Center with contributions from ESA. Using its ultraviolet camera, UVI will capture the glowing auroral oval that encircles Earth\u2019s northern magnetic pole. During geomagnetic storms \u2014 triggered when coronal mass ejections from the Sun reach Earth \u2013UVI will continuously observe the northern lights. Previous spacecraft could view the aurora for no more than around 15 hours at a time. This extended coverage will give scientists a much clearer picture of how geomagnetic storms drive and shape the auroral displays.<\/p>\n<p>Complementing the remote-sensing instruments is the in-situ Light Ion Analyzer (LIA), developed by CAS. The LIA will determine the properties and behavior of solar wind, magnetosheath, and magnetospheric ions in the vicinity of the SMILE spacecraft. The instrument is a twin-head electrostatic analyzer attached to the SMILE spacecraft.<\/p>\n<p>The final instrument in SMILE\u2019s science suite is the Magnetometer (MAG), developed jointly by the Chinese National Space Science Center and the Space Research Institute of the Austrian Academy of Sciences. Two tri-axial fluxgate sensors mounted on a three-meter deployable boom will measure the strength and direction of solar wind and will detect shocks and discontinuities. By operating as a gradiometer with sensors spaced 80 cm apart, MAG can accurately subtract the spacecraft\u2019s magnetic field, delivering in-situ data that complements the remote-sensing instruments on board.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-113392\" class=\"wp-image-113392 size-full\" src=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3979.jpeg\" alt=\"\" width=\"1289\" height=\"726\" srcset=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3979.jpeg 1289w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3979-350x197.jpeg 350w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3979-621x350.jpeg 621w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3979-768x433.jpeg 768w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/05\/IMG_3979-1170x659.jpeg 1170w\" sizes=\"(max-width: 1289px) 100vw, 1289px\"><\/p>\n<p id=\"caption-attachment-113392\" class=\"wp-caption-text\">Diagram of SMILE and its scientific instruments. (Credit: ESA)<\/p>\n<p>SMILE is an example of global scientific cooperation, marking the first time ESA and China have jointly selected, designed, and implemented a space science mission from initial proposal through launch operations. Data downlinked from the O\u2019Higgins Antarctic ground station will be processed and shared globally through open science networks.<\/p>\n<p>\u201cThe SXI hardware and flight software were developed by three UK institutions and institutions from Austria, Norway, Spain, Switzerland, and additional direct contributions from the European Space Agency. This was managed by the University of Leicester as the Principal Investigator Institution, with the support of the United Kingdom Space Agency, using industry-standard project management and system engineering approaches and leveraging our extensive heritage in space flight projects,\u201d explained Dr. Sembay.<\/p>\n<p>Space weather not only influences our power grids and satellites but also poses risks to astronauts aboard the International Space Station and on future missions to the Moon and Mars. SMILE will help develop a more comprehensive understanding of the solar wind\u2019s impact on Earth\u2019s magnetosphere and how it protects us. A deeper understanding of hazardous space weather can improve our ability to predict when and where these intense storms will occur and assess potential damage to Earth-based infrastructure. SMILE is expected to operate for three years and will provide scientists with their most accurate and detailed magnetospheric data to date.<\/p>\n<p>\u201cWe are often surprised by what we see when we explore the universe; that uncertainty is, after all, why we build these instruments,\u201d Dr. Sembay said.<\/p>\n<p><em>(Lead image: Vega C and SMILE liftoff from French Guiana. Credit: ESA)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The European Space Agency\u2019s (ESA) latest science mission, Solar Wind Magnetosphere Ionosphere Link Explorer (SMILE), launched on a four-stage Vega C rocket from French Guiana on Tuesday morning. SMILE, a collaboration between ESA, the Chinese Academy of Sciences (CAS), and multiple academic and commercial organizations, will capture the first global soft X-ray images of Earth\u2019s [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[246,2798,341,339,338,6217,1311,916],"class_list":["post-23520","post","type-post","status-publish","format-standard","hentry","category-news","tag-esa","tag-french-guiana","tag-kourou","tag-magnetosphere","tag-smile","tag-uksa","tag-vega","tag-vega-c"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/23520"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=23520"}],"version-history":[{"count":1,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/23520\/revisions"}],"predecessor-version":[{"id":30744,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/23520\/revisions\/30744"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=23520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=23520"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=23520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}