{"id":795345,"date":"2025-04-16T13:58:04","date_gmt":"2025-04-16T18:58:04","guid":{"rendered":"https:\/\/spaceweekly.com\/?p=795345"},"modified":"2025-04-16T13:58:04","modified_gmt":"2025-04-16T18:58:04","slug":"rare-tatooine-world-has-a-weird-orbit-around-brown-dwarfs","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=795345","title":{"rendered":"Rare Tatooine world has a weird orbit around brown dwarfs"},"content":{"rendered":"<p> <br \/>\n<\/p>\n<div>\n<p><iframe loading=\"lazy\" title=\"A planet in a perpendicular orbit around two brown dwarfs | ESO News\" width=\"1110\" height=\"624\" src=\"https:\/\/www.youtube.com\/embed\/VSl7QLU2pVU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><br \/><em>Strange Tatooine world: A planet in a perpendicular orbit around 2 brown dwarfs. Video via ESO.<\/em><\/p>\n<p><strong>Science matters. Wonder matters. You matter. Join our 2025 Donation Campaign today.<\/strong><\/p>\n<ul>\n<li><strong>Tatooine exoplanets are planets that orbit two or more stars.<\/strong> They are reminiscent of the fictional planet Tatooine in <em>Star Wars<\/em>.<\/li>\n<li><strong>They can also orbit brown dwarfs.<\/strong> Brown dwarfs are unusual objects that are larger than planets but smaller than stars. Astronomers have discovered a new exoplanet orbiting a pair of brown dwarfs.<\/li>\n<li><strong>But this planet has a weird orbit.<\/strong> It orbits perpendicular, at a 90 degree angle, to the orbits of the 2 brown dwarfs. It\u2019s the first system of its kind that astronomers have found.<\/li>\n<\/ul>\n<h3>Rare Tatooine world has a weird orbit<\/h3>\n<p>Just like Tatooine in <em>Star Wars<\/em>, exoplanets can sometimes orbit two or more stars at once. Now, using the Very Large Telescope in Chile, astronomers in Europe have found another such system, but this one\u2019s a little different. Instead of two regular stars, the planet orbits a pair of brown dwarfs, objects that are larger than planets but smaller than stars. But there\u2019s another twist. On April 16, 2025, the researchers said the orbit of the planet is perpendicular, at 90 degrees, to the orbits of the two brown dwarfs. Astronomers have seen hints of these kinds of orbits before, but this is the first confirmation of this kind of unique planetary system.<\/p>\n<p>The research team published their new peer-reviewed findings in <em>Science Advances<\/em> on April 16, 2025.<\/p>\n<h3>Eclipsing brown dwarfs<\/h3>\n<p>The astronomers discovered the exoplanet \u2013 named 2M1510 (AB) b \u2013 orbiting two binary brown dwarfs, known as 2M1510. Brown dwarfs are unusual objects, larger than planets but smaller than stars. And as is often the case, these two brown dwarfs are a binary pair. That means they orbit each other, similar to binary stars. But these are also <em>eclipsing brown dwarfs<\/em>, which are more rare. In fact, this is only the second eclipsing brown dwarf system astronomers have found so far. The orbits of the two brown dwarfs happen to be aligned so that they eclipse each other, as seen from Earth. Astronomers call this an eclipsing binary.<\/p>\n<figure id=\"attachment_507805\" aria-describedby=\"caption-attachment-507805\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><figcaption id=\"caption-attachment-507805\" class=\"wp-caption-text\">View larger. | Artist\u2019s concept of the Tatooine world 2M1510 (AB) b\u2019s unusual orbit around its 2 host brown dwarfs. The planet has a polar orbit, which is perpendicular to the plane in which the 2 stars orbit each other. This is the 1st strong evidence that such a planet actually exists in a polar orbit around 2 stars or brown dwarfs. Image via ESO\/ L. Cal\u00e7ada.<\/figcaption><\/figure>\n<h3>A Tatooine world, with a twist<\/h3>\n<p>This makes the system interesting on its own, but there\u2019s more. The planet itself orbits both brown dwarfs in a larger orbit. Indeed, astronomers have found several other systems like this, where the planet is orbiting a binary pair of stars. Such planets are reminiscent of the fictional world Tatooine in <em>Star Wars<\/em>.<\/p>\n<p>Those planets, however, orbit their stars on the same plane that the two stars orbit each other. But 2M1510 (AB) b is an oddball. Its orbit is <em>perpendicular<\/em>, at 90 degrees, to the orbits of the two brown dwarfs. Scientists call this a polar orbit. Astronomers have found hints of such polar orbits around binary stars before, but this is the first confirmation that these kinds of systems actually exist. It\u2019s the first exoplanet discovered that orbits at right angles to its two host stars (or brown dwarfs). And the fact that this orbit is around two brown dwarfs instead of two regular stars makes it all the more interesting.<\/p>\n<p>Thomas Baycroft is a PhD student at the University of Birmingham, U.K., and the lead author of the new paper. He said:<\/p>\n<blockquote>\n<p>I am particularly excited to be involved in detecting credible evidence that this configuration exists.<\/p>\n<\/blockquote>\n<p>Co-author Amaury Triaud at the University of Birmingham added:<\/p>\n<blockquote>\n<p>A planet orbiting not just a binary, but a binary brown dwarf, as well as being on a polar orbit is rather incredible and exciting.<\/p>\n<\/blockquote>\n<figure id=\"attachment_507811\" aria-describedby=\"caption-attachment-507811\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/earthsky.org\/upl\/2025\/04\/exoplanet-brown-dwarfs-artist-concept-ESO-April-16-2025.jpg\" alt=\"Thin crescent of a larger planet with 2 reddish stars in the distance. Other stars are in the background.\" width=\"800\" height=\"490\" class=\"size-full wp-image-507811\" srcset=\"https:\/\/earthsky.org\/upl\/2025\/04\/exoplanet-brown-dwarfs-artist-concept-ESO-April-16-2025.jpg 800w, https:\/\/earthsky.org\/upl\/2025\/04\/exoplanet-brown-dwarfs-artist-concept-ESO-April-16-2025-300x184.jpg 300w, https:\/\/earthsky.org\/upl\/2025\/04\/exoplanet-brown-dwarfs-artist-concept-ESO-April-16-2025-768x470.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\"\/><figcaption id=\"caption-attachment-507811\" class=\"wp-caption-text\">View larger. Artist\u2019s concept of an exoplanet orbiting 2 brown dwarfs. Image via ESO\/ M. Kornmesser.<\/figcaption><\/figure>\n<figure id=\"attachment_507931\" aria-describedby=\"caption-attachment-507931\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/earthsky.org\/upl\/2025\/04\/Thomas-Baycroft-University-of-Birmingham.png\" alt=\"Smiling man with tussled hair and eyeglasses. A black circle with emanating &quot;rays&quot; is behind him.\" width=\"500\" height=\"469\" class=\"size-full wp-image-507931\" srcset=\"https:\/\/earthsky.org\/upl\/2025\/04\/Thomas-Baycroft-University-of-Birmingham.png 500w, https:\/\/earthsky.org\/upl\/2025\/04\/Thomas-Baycroft-University-of-Birmingham-300x281.png 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\"\/><figcaption id=\"caption-attachment-507931\" class=\"wp-caption-text\">Thomas Baycroft at the University of Birmingham in the U.K. is the lead author of the new paper about this unusual exoplanet discovery. Image via GitHub.<\/figcaption><\/figure>\n<h3>A serendipitous discovery<\/h3>\n<p>The astronomers made the discovery using the Ultraviolet and Visual Echelle Spectrograph (UVES) instrument on the Very Large Telescope (VLT) at the Paranal Observatory in Chile. They noticed that something was \u201cpushing and pulling\u201d the two brown dwarfs in an unexpected way. The researchers tested various scenarios for what might be affecting the brown dwarfs and came to the conclusion it must be a planet, tugging at the brown dwarfs with its gravity. But the planet must be in an orbit at a right angle to the orbits of the brown dwarfs. Baycroft said:<\/p>\n<blockquote>\n<p>We reviewed all possible scenarios, and the only one consistent with the data is if a planet is on a polar orbit about this binary.<\/p>\n<\/blockquote>\n<p>He added:<\/p>\n<blockquote>\n<p>We had hints that planets on perpendicular orbits around binary stars could exist, but until now we lacked clear evidence of this type of polar planet. We reviewed all possible scenarios, and the only consistent with the data is if a planet is on a polar orbit about this binary.<\/p>\n<\/blockquote>\n<p>The discovery was a surprise for the scientists, as Triaud noted:<\/p>\n<blockquote>\n<p>The discovery was serendipitous, in the sense that our observations were not collected to seek such a planet, or orbital configuration. As such, it is a big surprise. Overall, I think this shows to us astronomers, but also to the public at large, what is possible in the fascinating universe we inhabit.<\/p>\n<\/blockquote>\n<p>Bottom line: Astronomers have discovered a Tatooine-like world orbiting two brown dwarfs. But strangely, the planet orbits the brown dwarfs at a 90 degree angle.<\/p>\n<p>Source: Evidence for a polar circumbinary exoplanet orbiting a pair of eclipsing brown dwarfs<\/p>\n<p>Via ESO<\/p>\n<p>Read more: Tatooine exoplanets may be more habitable than we thought<\/p>\n<p>Read more: After 29 years, first-known brown dwarf revealed as twins<\/p>\n<p><span class=\"cp-load-after-post\"\/><\/div>\n<div>\n<div class=\"post-author\">\n<h4>Paul Scott Anderson<\/h4>\n<p>                    View Articles\n                  <\/p><\/div>\n<div class=\"post-tags\">\n<h6 data-udy-fe=\"text_7c58270d\">About the Author:<\/h6>\n<p>Paul Scott Anderson has had a passion for space exploration that began when he was a child when he watched Carl Sagan\u2019s Cosmos. He studied English, writing, art and computer\/publication design in high school and college. He later started his blog The Meridiani Journal in 2005, which was later renamed Planetaria. He also later started the blog Fermi Paradoxica, about the search for life elsewhere in the universe.&#13;<br \/>\n&#13;<br \/>\nWhile interested in all aspects of space exploration, his primary passion is planetary science and SETI. In 2011, he started writing about space on a freelance basis with Universe Today. He has also written for SpaceFlight Insider and AmericaSpace and has also been published in The Mars Quarterly. He also did some supplementary writing for the iOS app Exoplanet.&#13;<br \/>\n&#13;<br \/>\nHe has been writing for EarthSky since 2018, and also assists with proofing and social media.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<p><br \/>\n<br \/><a href=\"https:\/\/earthsky.org\/space\/tatooine-world-exoplanet-brown-dwarfs-polar-orbit\/?rand=772280\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Strange Tatooine world: A planet in a perpendicular orbit around 2 brown dwarfs. Video via ESO. Science matters. Wonder matters. You matter. Join our 2025 Donation Campaign today. Tatooine exoplanets&hellip; <\/p>\n","protected":false},"author":1,"featured_media":795346,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-795345","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earth-sky"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/795345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=795345"}],"version-history":[{"count":0,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/795345\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/795346"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=795345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=795345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=795345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}