{"id":596715,"date":"2023-01-12T05:49:25","date_gmt":"2023-01-12T11:49:25","guid":{"rendered":"https:\/\/news.sellorbuyhomefast.com\/index.php\/2023\/01\/12\/the-webb-telescopes-first-confirmed-exoplanet-is-99-percent-the-diameter-of-earth\/"},"modified":"2023-01-12T05:49:25","modified_gmt":"2023-01-12T11:49:25","slug":"the-webb-telescopes-first-confirmed-exoplanet-is-99-percent-the-diameter-of-earth","status":"publish","type":"post","link":"https:\/\/newsycanuse.com\/index.php\/2023\/01\/12\/the-webb-telescopes-first-confirmed-exoplanet-is-99-percent-the-diameter-of-earth\/","title":{"rendered":"The Webb Telescope’s first confirmed exoplanet is 99 percent the diameter of Earth"},"content":{"rendered":"
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Having already returned visually stunning<\/a> and scientifically spectacular<\/a> results from its first six months in operation, the James Webb Space Telescope<\/a> has recorded another inaugural milestone: its first exoplanet discovery confirmation<\/a>. It peered 41 light years into the cosmos and found a planet in the Octans constellation with a diameter 99 percent that of Earth itself \u2014 say hello to LHS 475 b.<\/p>\n

Specifically a team of astronomers from the Johns Hopkins University Applied Physics Laboratory, led by Kevin Stevenson and Jacob Lustig-Yaeger, first spotted evidence of the candidate exoplanet while digging through data generated from NASA\u2019s Transiting Exoplanet Survey Satellite<\/a> (TESS). However it was Webb\u2019s Near-Infrared Spectrograph<\/a> (NIRSpec) that confirmed the planets existence by observing two transits in front of its parent star. \u201cThere is no question that the planet is there. Webb\u2019s pristine data validate it,\u201d Lustig-Yaeger declared in a NASA press release<\/a>.\u00a0<\/p>\n

As the space agency notes, among telescopes in operation today (both terrestrial and orbital), only the JWST possesses the resolving capabilities to accurately characterize the atmospheres of Earth-sized exoplanets. The research team is still working to determine what, if any, sort of atmosphere is sitting atop the rocky mass using by analyzing its transmission spectrum<\/a>.\u00a0<\/p>\n

There is a chance that the planet will be devoid of its critical gaseous insulation but at these distances, it could simply be hiding a very small atmo close to the surface. “Counterintuitively, a 100% carbon dioxide atmosphere is so much more compact that it becomes very challenging to detect,\u201d said Lustig-Yaeger.\u00a0<\/p>\n

They are confident that it does not possess an oppressive atmosphere similar to that of Saturn\u2019s moon Titan, however. \u201cThere are some terrestrial-type atmospheres that we can rule out,\u201d he said. \u201cIt can\u2019t have a thick methane-dominated atmosphere.\u201d\u00a0<\/p>\n

That said, the surface of the planet does appear to be around 300 Celsius, several hundred degrees warmer than here on Earth. If cloud cover is discovered in subsequent studies, it could suggest a greenhouse world climate closer to Venus. The researchers have also confirmed that LHS 475 b maintains a tidal-locked orbit with its star of just two days \u2014 far too close to attempt with Sol but, because LHS circles a red dwarf that’s producing less than half of our sun’s energy, can theoretically maintain an atmosphere.<\/p>\n<\/div>\n

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\n Andrew Tarantola<\/p>\n","protected":false},"excerpt":{"rendered":"

Having already returned visually stunning and scientifically spectacular results from its first six months in operation, the James Webb Space Telescope has recorded another inaugural milestone: its first exoplanet discovery confirmation. It peered 41 light years into the cosmos and found a planet in the Octans constellation with a diameter 99 percent that of Earth<\/p>\n","protected":false},"author":1,"featured_media":596716,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[673,46,34894],"tags":[],"class_list":{"0":"post-596715","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-first","8":"category-technology","9":"category-telescopes"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/posts\/596715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/comments?post=596715"}],"version-history":[{"count":0,"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/posts\/596715\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/media\/596716"}],"wp:attachment":[{"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/media?parent=596715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/categories?post=596715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/newsycanuse.com\/index.php\/wp-json\/wp\/v2\/tags?post=596715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}