\n
![\"EarthSnap\"\/](\"https:\/\/www.newsbeep.com\/uk\/wp-content\/uploads\/2025\/10\/1759526228_597_earthsnap-banner-news.webp.webp\")
\n<\/a><\/p>\n
A recent study published in the journal Icarus\u00a0explores that question with help from the James Webb Space Telescope (JWST<\/a>). <\/p>\n Using Webb\u2019s Mid-Infrared Instrument (MIRI<\/a>), researchers tested whether JWST could spot an Earth-sized planet in the glare of Proxima Centauri. Their models push the telescope\u2019s capabilities to the limit \u2013 and hint at what might come next.<\/p>\n Planet clues from a red dwarf<\/p>\n Proxima Centauri is small, cool, and dim compared with our Sun. That makes it ideal for planet searches because faint stars reveal planetary light more easily.<\/p>\n Astronomers already confirmed that there is one planet orbiting<\/a> it, but that discovery opened more questions than it gave answers.<\/p>\n Red dwarfs<\/a> like Proxima often erupt in intense flares that can strip away atmospheres. If Proxima b lost its envelope of gas, another world farther out might offer better conditions. <\/p>\n The Webb telescope\u2019s powerful infrared eyes can peer through the dust and glare to test that idea.<\/p>\n Testing the telescope\u2019s limits<\/p>\n The study focused on whether Webb could see the faint heat from a rocky planet roughly the size of Earth. <\/p>\n The team simulated observations of Proxima Centauri using MIRI\u2019s coronagraph, which blocks a star\u2019s blinding light so that faint companions become visible.<\/p>\n They tested planets between 0.1 and 1 arcsecond from the star \u2013 roughly 0.2 to 0.5 astronomical units, or half the distance from Earth to the Sun. <\/p>\n At that range, a planet would orbit Proxima every few months, staying within or near to the region where liquid water could exist.<\/p>\n Crafting realistic star scenes<\/p>\n A perfect simulation doesn\u2019t exist, so the researchers built one as close as possible to reality. They added background noise from zodiacal dust, heat from the telescope itself, and small optical distortions. <\/p>\n The experts also modeled how accurately JWST could subtract starlight using a reference star<\/a>.<\/p>\n The test planets varied in temperature (250 K, 400 K, and 600 K) to see how heat affected visibility. Cooler worlds mimic Earth\u2019s warmth; hotter ones glow brighter in infrared light. Each case revealed a different challenge for the telescope\u2019s sensitivity and contrast limits.<\/p>\n What Webb found at Proxima Centauri<\/p>\n Webb can\u2019t easily spot a true Earth twin in orbit around Proxima Centauri. The planet\u2019s heat signal would drown in the star\u2019s light and background noise. But the study offered hope for slightly larger worlds \u2013 roughly 1.5 to 2 times Earth\u2019s radius.<\/p>\n Warmer planets, around 400 K or more, emitted enough radiation for MIRI to detect under near-perfect conditions. <\/p>\n The sweet spot lies around 0.3 astronomical units, where separation from the star balances brightness and detectability. Closer planets hide behind the coronagraph\u2019s mask; farther ones fade into the noise.<\/p>\n Even so, these findings mark progress. For the first time, researchers mapped Webb\u2019s realistic limits for finding small, warm planets near the closest star to Earth.<\/p>\n Heat reveals hidden worlds<\/p>\n Most planet searches rely on visible light<\/a>, but that\u2019s a losing battle around a red dwarf. These stars barely shine in the visible range. <\/p>\n Their planets, however, glow with thermal infrared radiation. MIRI observes at 10 micrometers, the wavelength where such heat peaks.<\/p>\n At those wavelengths, an Earth-temperature planet around Proxima Centauri would appear brightest. That makes MIRI ideal for this search. Still, infrared imaging is tricky.<\/p>\n The telescope must stay perfectly stable. Even tiny pointing errors can bury a planet\u2019s faint signature. The study shows how demanding those conditions are \u2013 and how close Webb already comes.<\/p>\n Capturing planets in view<\/p>\n Direct imaging skips the need for planetary transits or gravitational wobbles. It captures light from the planet itself. That light reveals not only existence but also temperature and, one day, atmospheric composition.<\/p>\n The team\u2019s approach demonstrates what direct imaging could achieve with current instruments. It also shows where technology must improve. <\/p>\n A future telescope with a bigger mirror or an advanced coronagraph could finally isolate an Earth-sized planet around the nearest stars.<\/p>\n Life around red dwarfs<\/p>\n Red dwarfs make up most of the stars in our galaxy<\/a>. If even a few of them host habitable worlds, the universe could teem with life. <\/p>\n Yet these stars challenge that idea. They erupt often, blasting planets with radiation. Survival depends on a strong magnetic field or a thick atmosphere.<\/p>\n Thermal imaging helps test that balance. A warm signal could point to a dense atmosphere trapping heat. A faint one might mean a frozen, airless rock. <\/p>\n Results from the Webb telescope will refine those models and prepare the way for future missions such as LUVOIR or HabEx, which are designed to study Earth-like worlds in detail.<\/p>\n Planets beyond Webb\u2019s reach<\/p>\n Webb\u2019s limits don\u2019t mark an end \u2013 they outline a beginning. Even if it never spots a second planet around Proxima Centauri, its data will sharpen our understanding of nearby systems.<\/p>\n The telescope can measure dust, background light, and calibration precision, all vital for future designs.<\/p>\n Upcoming observatories could combine light from multiple telescopes, creating mid-infrared interferometers that are capable of detecting planets smaller than Earth. <\/p>\n This study\u2019s simulations will guide those efforts, showing where technology must advance.<\/p>\n The Proxima Centauri search matters<\/p>\n Finding another Earth<\/a> nearby would change how humanity sees itself. Proxima Centauri lies close enough that robotic probes might reach it within decades. <\/p>\n Knowing whether the system hosts another rocky world helps plan such missions and, more profoundly, reminds us how rare our planet might be.<\/p>\n This research turns that search into a measurable goal. It proves that JWST, though built for distant galaxies, can still chase the faint heat of neighboring worlds. <\/p>\n Each improvement brings the dream closer: to see another pale dot that might hold oceans, clouds, and perhaps life.<\/p>\n The search for another Earth<\/p>\n The study ends on a grounded note. JWST can probably detect a warm super-Earth but not a true Earth-sized twin. Still, it narrows the gap.<\/p>\n By combining careful modeling with new imaging techniques, researchers are learning how to spot the smallest, most elusive planets. <\/p>\n The search for another Earth no longer feels impossible. It feels like a matter of time \u2013 and better tools.<\/p>\n The researchers are affiliated with\u00a0Planetary Science Institute\u00a0(Tucson, Arizona),\u00a0Cornell University,\u00a0University of Oregon, and\u00a0NASA Ames Research Center.<\/p>\n The study is published in the journal Icarus<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.\u00a0<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Scientists keep returning to one star: Proxima Centauri. It\u2019s the nearest neighbor to our Sun, just over four…\n","protected":false},"author":2,"featured_media":247225,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[90,416,56,54,55],"class_list":{"0":"post-247224","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-space","8":"tag-science","9":"tag-space","10":"tag-uk","11":"tag-united-kingdom","12":"tag-unitedkingdom"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/247224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/comments?post=247224"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/247224\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media\/247225"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media?parent=247224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/categories?post=247224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/tags?post=247224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}