{"id":23488,"date":"2026-06-28T17:50:23","date_gmt":"2026-06-28T09:50:23","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/euclid-studies-milky-way-center-supports-future-roman-observations\/"},"modified":"2026-06-28T17:50:23","modified_gmt":"2026-06-28T09:50:23","slug":"euclid-studies-milky-way-center-supports-future-roman-observations","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/euclid-studies-milky-way-center-supports-future-roman-observations\/","title":{"rendered":"Euclid studies Milky Way center, supports future Roman observations"},"content":{"rendered":"<p>The European Space Agency (ESA) recently released a new picture of the center of the Milky Way galaxy, an area known as the galactic bulge. Containing over 60 million stars, the picture, taken by ESA\u2019s Euclid space telescope, represents the largest and most detailed photo of this region to date.<\/p>\n<p>Euclid observed the area outside of its regular survey in support of NASA\u2019s upcoming Nancy Grace Roman Space Telescope\u2019s exoplanet study. This week, Roman arrived at NASA\u2019s Kennedy Space Center (KSC) in Florida, where technicians will prepare it for its launch atop a SpaceX Falcon Heavy no earlier than Aug. 30.<\/p>\n<\/p>\n<p>The new image \u2014 which consists of nine individual pictures, or pointings, stitched together in a mosaic \u2014 covers a five-square-degree area of sky, roughly equivalent to 25 full Moons. Euclid captured the photo on March 23, 2025, training its camera on the area for 26 hours. The telescope used only its visible light sensor (VIS) for this study, so the image lacks color. ESA used ground-based observations from the Canada-France-Hawai\u2019i Telescope (CFHT) to add color to the image ahead of its release.<\/p>\n<\/p>\n<p><iframe title=\"Euclid captures the Milky Way\u2019s crowded heart\" src=\"https:\/\/www.youtube.com\/embed\/2DtFRq1cgcc?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"\" name=\"fitvid0\"><\/iframe><\/p>\n<p>Euclid\u2019s study of the galactic bulge marks a break from its regular mission, measuring the shapes of billions of galaxies in this area to map the distribution of dark matter throughout the universe. This wide survey takes about two-thirds of Euclid\u2019s total mission time, during which it observes approximately a third of the sky away from the galactic plane as well as the Solar System\u2019s Ecliptic plane.<\/p>\n<h4 class=\"widget-title penci-border-arrow\">See Also<\/h4>\n<ul>\n<li>Euclid Updates<\/li>\n<li>Roman Updates <\/li>\n<li>Space Science coverage<\/li>\n<li>NSF Store<\/li>\n<li>Click here to Join L2<\/li>\n<\/ul>\n<p>\u201cThis is the only time Euclid has paused its normal sky survey, which is mainly geared toward cosmology,\u201d said U.S. Euclid science lead Jason Rhodes of NASA\u2019s Jet Propulsion Laboratory (JPL), who also serves as NASA JPL Roman project scientist. &nbsp;\u201cThis takes a lot of work and planning, so it really has to be something with a high impact for science. Adding Euclid\u2019s snapshot to Roman\u2019s future survey will help us map our galaxy better and identify hard-to-find cosmic treasures like isolated black holes and rogue planets more easily.\u201d<\/p>\n<p>Roman will point its instruments at parts of the area studied by Euclid to detect exoplanets by observing an effect called microlensing, which occurs when a star lines up behind another from the telescope\u2019s point of view.<\/p>\n<p>Astronomy<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>Atmospheric Science<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>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>\n<p>     (adsbygoogle = window.adsbygoogle || []).push({});<\/p>\n<p>Microlensing is a small-scale effect of gravitational lensing, which effectively bends light as it travels through the curved spacetime around massive objects. In the case of Roman\u2019s study, the foreground star\u2019s gravity distorts the background star\u2019s image like a lens. If the foreground star hosts a planet, this causes a subtle additional distortion.<\/p>\n<p><!--[if lt IE 9]>document.createElement('video');<![endif]--><br \/>\nVideo Player<mediaelementwrapper id=\"video-113990-1\"><video class=\"wp-video-shortcode\" id=\"video-113990-1_html5\" width=\"640\" height=\"360\" preload=\"metadata\" src=\"https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/wfirst-microlensing-s1a-4k-30fps-h264.mp4?_=1\" style=\"width: 640px; height: 360px;\">https:\/\/science.nasa.gov\/wp-content\/uploads\/2023\/10\/wfirst-microlensing-s1a-4k-30fps-h264.mp4<\/video><\/mediaelementwrapper><button type=\"button\" aria-controls=\"mep_0\" title=\"Play\" aria-label=\"Play\" tabindex=\"0\"><\/button>00:0000:0000:16<button type=\"button\" aria-controls=\"mep_0\" title=\"Mute\" aria-label=\"Mute\" tabindex=\"0\"><\/button>Use Up\/Down Arrow keys to increase or decrease volume.<button type=\"button\" aria-controls=\"mep_0\" title=\"Fullscreen\" aria-label=\"Fullscreen\" tabindex=\"0\"><\/button><\/p>\n<p><em>(Video: Animation of Roman observing microlensing. Credit: NASA Goddard\u2019s Scientific Visualization Studio)<\/em><\/p>\n<p>\u201cDuring the last twenty years, almost 300 exoplanets have been discovered using this technique, all with ground-based telescopes and all towards the center of our galaxy. This image from Euclid includes 51 known planetary systems \u2014 and it will assist in studying many more that will be found,\u201d said Euclid\u2019s galactic bulge survey original instigator Jean-Philippe Beaulieu of the Institut d\u2019Astrophysique de Paris in France, and the University of Tasmania in Australia.<\/p>\n<p>The microlensing technique works best on stars in high-density regions, like the Milky Way\u2019s center. Detecting microlensing events requires observing how the star\u2019s light changes for a period of more than 20 days, much longer than Euclid\u2019s galactic bulge survey.<\/p>\n<p>Despite not containing new microlensing events, Euclid\u2019s observations help extend Roman\u2019s study by adding data upfront. Euclid\u2019s survey will help astronomers discern lens stars and measure their masses. Moreover, it will also determine whether planets far away from stars are in distant orbits or rogue planets that don\u2019t orbit any stars at all.<\/p>\n<p>\u201cEuclid has already captured the stars involved in all the future microlensing events that the Roman space telescope will detect, but before the stars and planets involved have aligned,\u201d said Natalia Rektsini of the Institut d\u2019Astrophysique de Paris, who led the release of Euclid\u2019s galactic bulge survey data for the scientific community.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-113991 size-full\" src=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/euclid_galactic_bulge_twis.jpg\" alt=\"\" width=\"1920\" height=\"1080\" srcset=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/euclid_galactic_bulge_twis.jpg 1920w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/euclid_galactic_bulge_twis-350x197.jpg 350w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/euclid_galactic_bulge_twis-622x350.jpg 622w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/euclid_galactic_bulge_twis-768x432.jpg 768w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/euclid_galactic_bulge_twis-1170x658.jpg 1170w\" sizes=\"(max-width: 1920px) 100vw, 1920px\"><\/p>\n<p>\u201cThis means that anyone who detects a microlensing event in the same region, for example, with Roman, will be able from now on to use Euclid data as a time reference in the past and see how the stars looked before they overlapped,\u201d said Rektsini. \u201cSince Euclid can clearly separate individual stars, one can then measure how fast they move over time and use that information to confirm the existence of a planet and determine its mass. This would not be possible with data from one point in time.\u201d<\/p>\n<p>Two years after Euclid studied the galactic bulge, Roman will start observing parts of the same area in spring 2027, to detect microlensing events. While both telescopes have a similar resolution, Roman will be able to peer deeper into the Milky Way\u2019s core and also collect more color detail compared to Euclid\u2019s observations.<\/p>\n<p>Beyond Roman\u2019s exoplanet mission, Euclid\u2019s observations also support the forthcoming telescope\u2019s Galactic Plane Survey to map the galaxy in unprecedented detail. Roman\u2019s other science goals include the study of dark matter, dark energy, and infrared astrophysics.<\/p>\n<p>NASA completed construction of the Nancy Grace Roman Space Telescope in late November, 2025. Since then, the agency has subjected the telescope to a series of tests to ensure its readiness for launch. Throughout its development and testing, the program has run ahead of schedule and under budget.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-113993\" class=\"size-full wp-image-113993\" src=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-scaled.jpg\" alt=\"\" width=\"2560\" height=\"1707\" srcset=\"https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-scaled.jpg 2560w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-350x233.jpg 350w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-525x350.jpg 525w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-768x512.jpg 768w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-1920x1280.jpg 1920w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-1170x780.jpg 1170w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-585x390.jpg 585w, https:\/\/www.nasaspaceflight.com\/wp-content\/uploads\/2026\/06\/260621_NGR_5_scaled-263x175.jpg 263w\" sizes=\"(max-width: 2560px) 100vw, 2560px\"><\/p>\n<p id=\"caption-attachment-113993\" class=\"wp-caption-text\">Roman arrives at NASA\u2019s Kennedy Space Center. (Credit: Jerry Pike for NSF)<\/p>\n<p>After completing integration and testing at NASA\u2019s Goddard Space Flight Center in Maryland, the agency shipped Roman to the KSC, where it arrived on June 21 aboard NASA\u2019s Pegasus barge. A truck then carried the telescope to the Payload Hazardous Servicing Facility.<\/p>\n<p>Next, technicians will perform final tests of Roman\u2019s solar panels and perform several inspections and other tasks to ensure the telescope is ready for flight. Additionally, teams will load the spacecraft\u2019s tanks with hydrazine fuel.<\/p>\n<p>NASA and SpaceX target Aug. 30 for Roman\u2019s launch atop a Falcon Heavy from KSC\u2019s Launch Complex 39A (LC-39A). Once in space, the telescope will travel to the Sun-Earth Lagrange point 2 (L2), where Euclid and the James Webb Space Telescope also reside.<\/p>\n<p>With Euclid\u2019s galactic bulge survey now released to the scientific community, Roman\u2019s discoveries get a head start before the telescope can point its cameras at the stars.<\/p>\n<p>\u201cWe\u2019ve shown that these two telescopes can work together to do science that surpasses what either was originally designed for,\u201d Rhodes said. \u201cIn doing so, we\u2019ve established a model for future coordinated observations that can unlock far more discoveries than either mission could make alone.\u201d<\/p>\n<p><em>(Lead image: Euclid\u2019s Galactic Bulge survey kick-starts Roman\u2019s exoplanet mission. Credit: Euclid Galactic Bulge survey: ESA\/Euclid\/Euclid Consortium\/NASA, CFHT, image processing by J.-C. Cuillandre and E. Bertin (CEA Paris-Saclay), Roman rendering: NASA Goddard Space Flight Center Scientific Visualization Studio. )<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The European Space Agency (ESA) recently released a new picture of the center of the Milky Way galaxy, an area known as the galactic bulge. Containing over 60 million stars, the picture, taken by ESA\u2019s Euclid space telescope, represents the largest and most detailed photo of this region to date. Euclid observed the area outside [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[246,1539,559,678,7764,7765,428,7766,7767,7768,680,190,7769],"class_list":["post-23488","post","type-post","status-publish","format-standard","hentry","category-news","tag-esa","tag-euclid","tag-exoplanets","tag-falcon-heavy","tag-galactic-bulge","tag-gravitational-lensing","tag-kennedy-space-center","tag-ksc","tag-microlensing","tag-milky-way","tag-nancy-grace-roman-space-telescope","tag-nasa","tag-roman"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/23488"}],"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=23488"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/23488\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=23488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=23488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=23488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}