{"id":32843,"date":"2024-04-22T19:18:06","date_gmt":"2024-04-22T19:18:06","guid":{"rendered":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/04\/22\/plutos-heart-shaped-basin-might-not-hide-an-ocean-after-all\/"},"modified":"2024-04-22T19:18:07","modified_gmt":"2024-04-22T19:18:07","slug":"plutos-heart-shaped-basin-might-not-hide-an-ocean-after-all","status":"publish","type":"post","link":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/04\/22\/plutos-heart-shaped-basin-might-not-hide-an-ocean-after-all\/","title":{"rendered":"Pluto\u2019s heart-shaped basin might not hide an ocean after all"},"content":{"rendered":"<div style=\"text-align:center\"><\/div> \r\n<br><br><div data-component=\"video-embed\">\n\t\t\t\t\n\n\n\n\n<p>Rather than a vast ocean, Pluto\u2019s heart might be hiding a huge, heavy treasure.<\/p>\n\n\n\n<p>Computer simulations suggest that an object about 730 kilometers wide, slightly larger than the asteroid Vesta, could have <a href=\"https:\/\/www.nature.com\/articles\/s41550-024-02248-1\" target=\"_blank\" rel=\"noopener\">slammed into the dwarf planet<\/a> billions of years ago, forming the famous Sputnik Planitia and leaving behind a rocky remnant, researchers report April 15 in <em>Nature Astronomy<\/em>.<\/p>\n\n\n\n<p>Sputnik Planitia first appeared in images taken by NASA\u2019s New Horizons spacecraft <a href=\"https:\/\/www.sciencenews.org\/article\/mission-pluto-live-coverage\">as it zipped past Pluto<\/a> in 2015 (<em>SN: 7\/15\/15<\/em>). The heart-shaped feature, which has roughly the same area as the Democratic Republic of Congo, sits three to four kilometers below the rest of Pluto\u2019s surface and is filled with frozen nitrogen.<\/p>\n\n\n<aside class=\"sn-conversion rich-text rich-text--with-sidebar\">\n<style><![CDATA[\n.email-conversion {\n  border: 1px solid #ffcccb;\n  color: white;\n  margin-top: 50px;\n  background-image: url(\"\/wp-content\/themes\/sciencenews\/client\/src\/images\/cta-module@2x.jpg\");\n  padding: 20px;\n  clear: both;\n}\n\n]]><\/style>\n\n\n\n                        <style class=\"is-layout-flow 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*{color:var(--zephr-color-text-main)}.apple-pay-button{display:inline-block;-webkit-appearance:-apple-pay-button;-apple-pay-button-type:pay;width:440px;max-width:100%;height:45px;margin-top:20px}.apple-pay-button-black{-apple-pay-button-style:black}.zephr-payment-form-disabled-div{pointer-events:none;opacity:0.8}.zephr-payment-form-relative-container{position:relative}.zephr-payment-form-flex-container{display:flex}.zephr-form-input-inner-button{cursor:pointer;position:absolute;top:50%;transform:translateY(-50%);right:5px;padding:10px 5px}.zephr-payment-form-input-inner-text{color:var(--zephr-color-text-main);font-size:12px;font-weight:bold;font-family:var(--zephr-typography-body-font),\n            var(--zephr-typography-body-fallbackFont)}\n]]><\/style>\n                        \n                        <style><![CDATA[#zephr-payment-form-root > div {\n    background-image: url(https:\/\/sciencenews.org\/wp-content\/themes\/sciencenews\/client\/src\/images\/cta-module@2x.jpg);\n    padding:20px;\n    max-width: 100%;\n   \n}\n\n#zephr-payment-form-root > div > button {\n    max-width: 50%;\n    margin-left: auto;\n    margin-right: auto;\n    border-radius: 1px;\n    background-color: #e04821;\n    color: white;\n}\n#zephr-payment-form-root > div > div.zephr-payment-form-custom-text.svelte-s692p7{\n    color:white;\n}\n#zephr-payment-form-root > div > label > span {\n    color:white;\n}    \n.zephr-payment-form-input-label.svelte-1ozx4pz span.svelte-1ozx4pz {\n    display: none;\n}\n\n.zephr-payment-form-custom-text.svelte-s692p7 {\n    color:white;\n}\n\nbutton.zephr-payment-form-button.svelte-1hlz8zp.zephr-payment-form-button-top-margin {\n    background: #d4441f;\n    font-weight: bold;\n    text-transform: uppercase;\n}\n\nlabel.zephr-payment-form-checkbox-label.svelte-1rzrrj8 {\n    color: white;\n    font-size: 1.6rem;\n}\n\n.zephr-payment-form-custom-text.svelte-s692p7 {\n    margin-top: .2rem;\n}\n\n.zephr-payment-form-checkbox-label.svelte-eq3e4e {\n    display: flex;\n    align-items: center;\n    font-family: var(--zephr-typography-body-font), var(--zephr-typography-body-fallbackFont);\n    color: white;\n    font-weight: bold;\n}]]><\/style>\n                        \n                        \n<\/aside>\n\n\n<p>\u201cWe think it\u2019s an impact basin, because that\u2019s the easiest way to make a giant hole in the ground,\u201d says planetary scientist Adeene Denton of the University of Arizona in Tucson.<\/p>\n\n\n\n<p>Yet the basin\u2019s location, across Pluto\u2019s equator, is perplexing. Knocking a huge hole in one side of a rotating object, such as a dwarf planet or moon, would lead to unstable wobbles that shift the object\u2019s tilt over millions of years. This explains, for instance, why the enormous Aitken basin on Earth\u2019s moon presently sits near the lunar south pole.<\/p>\n\n\n\n<p>Some scientists have proposed that the impact that created Pluto\u2019s heart also created <a href=\"https:\/\/www.sciencenews.org\/article\/pluto-subsurface-ocean-may-be-old-deep-nasa-new-horizons\">a dense, subterranean ocean of liquid water<\/a>, which has kept Sputnik Planitia situated at the equator (<em>SN: 3\/27\/20<\/em>). But explaining how the purported ocean could have survived over geologic time has proved challenging. Pluto\u2019s surface is a frigid \u2013230\u00b0 Celsius and even the base of Sputnik Planitia is probably far below water\u2019s freezing point.<\/p>\n\n\n\n<p>\u201cWhat if Pluto didn\u2019t have an ocean at all?\u201d Denton says.<\/p>\n\n\n\n<p>To explore this possibility, she and her colleagues used computer simulations to see what would happen if rocky objects of different sizes crashed into Pluto. A space rock that\u2019s roughly 730 kilometers in diameter is large enough to have a dense, solid core surrounded by lighter-weight materials. As a simulated object of such size plowed into Pluto, the impactor\u2019s exterior vaporized but its heavy center remained intact. The core eventually settled below Sputnik Planitia\u2019s surface, where it could keep the heart from straying.\u00a0<\/p>\n\n\n\n<p>\u201cThis is an important idea for us to be thinking about and exploring,\u201d says Carver Bierson, a planetary scientist at Arizona State University in Tempe who wasn\u2019t involved in the work. Other researchers have raised doubts about cold, tiny Pluto having an ocean, so he\u2019s happy to see an alternative model that can explain Sputnik Planitia\u2019s properties.<\/p>\n\n\n\n<p>Definitively determining which idea is correct will probably require placing an orbiter around Pluto that can measure the dwarf planet\u2019s gravitational field, Denton says. Such a mission has been proposed, though would take decades to reach its goals.<\/p>\n\n\n\n\t\t\t<\/div>\r\n<br>\r\n<br><a href=\"https:\/\/www.sciencenews.org\/article\/pluto-heart-sputnik-planitia-no-ocean\">Source link <\/a>","protected":false},"excerpt":{"rendered":"<p>Rather than a vast ocean, Pluto\u2019s heart might be hiding a huge, heavy treasure. Computer simulations suggest that an object about 730 kilometers wide, slightly larger than the asteroid Vesta, could have slammed into the dwarf planet billions of years ago, forming the famous Sputnik Planitia and leaving behind a rocky remnant, researchers report April [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":32844,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","fifu_image_url":"https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/04\/041824_am_Pluto_feat.jpeg?fit=800%2C450&ssl=1","fifu_image_alt":"","footnotes":""},"categories":[606],"tags":[36636,36635,23461,4522,36634],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/32843"}],"collection":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/comments?post=32843"}],"version-history":[{"count":1,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/32843\/revisions"}],"predecessor-version":[{"id":32845,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/32843\/revisions\/32845"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media\/32844"}],"wp:attachment":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media?parent=32843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/categories?post=32843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/tags?post=32843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}