{"id":60499,"date":"2024-06-28T08:15:28","date_gmt":"2024-06-28T08:15:28","guid":{"rendered":"http:\/\/3d442049-493f-4dd2-b9fd-f1b63858e289"},"modified":"2024-06-28T08:41:14","modified_gmt":"2024-06-28T08:41:14","slug":"how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/rss_feed\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star\/","title":{"rendered":"How astronomers discovered Kepler-452b, an Earth-like planet orbiting a Sun-like star"},"content":{"rendered":"<p class=\"rssexcerpt\">The discovery of a habitable planet like our own marked a milestone in the journey to find a second Earth. <\/p><p class=\"rssauthor\">By Iain Todd\n      <\/p><p class=\"rssbyline\">Published: Friday, 28 June 2024 at 08:15 AM<\/p><hr class=\"no-tts wp-block-separator\"\/><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/REC-html40\/loose.dtd\">\n<html><body><p>Exoplanet Kepler-452b is often referred to as an &#8216;Earth 2.0&#8217; and was discovered on 23 July 2015 by mission scientists using data from the NASA <a href=\"https:\/\/www.skyatnightmagazine.com\/space-missions\/a-history-of-the-kepler-space-telescope\">Kepler Space Telescope<\/a>.<\/p><p>Kepler-452b is located 1,400 <a href=\"https:\/\/www.skyatnightmagazine.com\/space-science\/lightyear\">lightyears<\/a> from Earth and is special because at the time it was the smallest known planet in the habitable zone around a Sun-like star.<\/p><figure class=\"wp-block-image size-full\"><figcaption class=\"wp-element-caption\">Artist&#8217;s illustration of the Kepler space telescope observing exoplanets. Credit: NASA\/JPL-Caltech (K. Walbolt)<\/figcaption><\/figure><p>This means the planet orbits its host star at the right distance for liquid water to be able to pool on its surface.<\/p><p>And that&#8217;s one property that makes it a &#8216;<a href=\"https:\/\/www.skyatnightmagazine.com\/space-science\/what-makes-a-planet-habitable\">habitable planet<\/a>&#8216;, as far as astronomers are concerned.<\/p><p>What&#8217;s more, the discovery of Kepler-452b made headlines because it was discovered 20 years after the discovery of the first known planet orbiting a Sun-like star beyond our Solar System.<\/p><p>&#8220;On the 20th anniversary year of the discovery that proved other suns host planets, the Kepler exoplanet explorer has discovered a planet and star which most closely resemble Earth and our Sun,&#8221; said John Grunsfeld, associate administrator of NASA\u2019s Science Mission Directorate, at the time of the discovery.<\/p><p>\u201cThis exciting result brings us one step closer to finding an Earth 2.0.&#8221;<\/p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/c02.purpledshub.com\/uploads\/sites\/48\/2015\/07\/kepler-452-solar-system-1024x723.jpg?fit=800%2C565\" alt=\"Diagram showing how the Kepler-452 system compares to our Solar System. Credit: NASA Ames\/JPL-CalTech\/R. Hurt\" class=\"wp-image-158383\" data-recalc-dims=\"1\"\/><figcaption class=\"wp-element-caption\">Diagram showing how the Kepler-452 system compares to our Solar System. Credit: NASA Ames\/JPL-CalTech\/R. Hurt<\/figcaption><\/figure><h2 class=\"wp-block-heading\" id=\"h-why-kepler-452b-is-like-earth\"><strong>Why Kepler-452b is like Earth<\/strong><\/h2><p>Kepler-452b is 60% larger in diameter than Earth, making it a super-Earth size planet. And research suggests that exoplanets this size could potentially be rocky.<\/p><p>The exoplanet&#8217;s orbit is 385 days, making its year just 5% longer than Earth&#8217;s orbit.<\/p><p>And its orbital track is 5% farther from star Kepler-452 than Earth is from the Sun.<\/p><p>Star Kepler-452 is 6 billion years old, 1.5 billion years older than our Sun, has a similar temperature, is 20% brighter and has a diameter 10% larger.<\/p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/c02.purpledshub.com\/uploads\/sites\/48\/2015\/07\/Kepler-452b-earth-1024x576.jpg?fit=800%2C450\" alt=\"Diagram showing how exoplanet Kepler-452b compares to Earth. Credit: NASA Ames\/JPL-CalTech\/R. Hurt\" class=\"wp-image-158384\" data-recalc-dims=\"1\"\/><figcaption class=\"wp-element-caption\">Diagram showing how exoplanet Kepler-452b compares to Earth. Credit: NASA Ames\/JPL-CalTech\/R. Hurt<\/figcaption><\/figure><p>\u201cWe can think of Kepler-452b as an older, bigger cousin to Earth, providing an opportunity to understand and reflect upon Earth\u2019s evolving environment,&#8221; said Jon Jenkins, Kepler data analysis lead at NASA&#8217;s <a href=\"http:\/\/www.nasa.gov\/centers\/ames\/home\/index.html\" target=\"_blank\" rel=\"noreferrer noopener\">Ames Research Center<\/a> in Moffett Field, California, who led the team that discovered Kepler-452b.<\/p><p>&#8220;It\u2019s awe-inspiring to consider that this planet has spent 6 billion years in the habitable zone of its star; longer than Earth.<\/p><p>&#8220;That\u2019s substantial opportunity for life to arise, should all the necessary ingredients and conditions for life exist on this planet.\u201d<\/p><p><strong>Info on Kepler-452b released by NASA was collected through ground-based observations at the <a href=\"http:\/\/www.utexas.edu\/\" target=\"_blank\" rel=\"noreferrer noopener\">University of Texas at Austin<\/a>&#8216;s <a href=\"https:\/\/mcdonaldobservatory.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">McDonald Observatory<\/a>, the <a href=\"https:\/\/www.cfa.harvard.edu\/facilities\/flwo\/\" target=\"_blank\" rel=\"noreferrer noopener\">Fred Lawrence Whipple Observatory<\/a> on Mt. Hopkins, Arizona and the <a href=\"http:\/\/www.keckobservatory.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">W. M. Keck Observatory<\/a> atop Mauna Kea in Hawaii.<\/strong><\/p> <\/body><\/html>\n<hr class=\"no-tts wp-block-separator\"\/>","protected":false},"excerpt":{"rendered":"<p>The discovery of a habitable planet like our own marked a milestone in the journey to find a second Earth. <\/p>\n","protected":false},"author":24,"featured_media":60500,"template":"","categories":[1],"acf":{"readingTimeMinutes":"3"},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2024\/06\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star.jpg",1200,675,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2024\/06\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2024\/06\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star-300x169.jpg",300,169,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2024\/06\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star-768x432.jpg",768,432,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2024\/06\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star-1024x576.jpg",800,450,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2024\/06\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star.jpg",1200,675,false],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/77\/2024\/06\/how-astronomers-discovered-kepler-452b-an-earth-like-planet-orbiting-a-sun-like-star.jpg",1200,675,false]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"The discovery of a habitable planet like our own marked a milestone in the journey to find a second Earth.","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/rss_feed\/60499"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/rss_feed"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/types\/rss_feed"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/users\/24"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media\/60500"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/media?parent=60499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/wp-json\/wp\/v2\/categories?post=60499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}