First possible 'survivor' planet found orbiting white dwarf star

पहले संभव ‘उत्तरजीवी’ ग्रह ने सफेद बौने तारे की परिक्रमा की विज्ञान और पर्यावरण समाचार

वाशिंगटन: नासा के मिशनों के आंकड़ों का उपयोग करते हुए, खगोलविदों की एक अंतरराष्ट्रीय टीम ने पाया है कि एक सफेद बौना की परिक्रमा करने वाला पहला अक्षुण्ण ग्रह क्या हो सकता है, जो सूर्य जैसे तारे के घने बचे हुए हिस्से, पृथ्वी से केवल 40 प्रतिशत बड़ा है।

WD 1856 b नामक बृहस्पति के आकार की वस्तु, सफेद बौने से लगभग सात गुना बड़ी है, जिसका नाम WD 1856/534 है। यह इस तारकीय चक्र को हर 34 घंटे में हल करता है, बुध की तुलना में 60 गुना अधिक तेज हमारे सूर्य की परिक्रमा करता है।

अमेरिका में विस्कॉन्सिन-मैडिसन विश्वविद्यालय में एस्ट्रोनॉमी के सहायक प्रोफेसर लीड शोधकर्ता एंड्रयू वेंडरबर्ग ने कहा, “डब्ल्यूडी 1856 बी किसी तरह अपने सफेद बौने के करीब पहुंच गया और एक टुकड़े में रहने में कामयाब रहा।”

“सफ़ेद बौना निर्माण प्रक्रिया पास के ग्रहों को नष्ट कर देती है, और कुछ भी जो बाद में बहुत करीब हो जाता है, आमतौर पर स्टार के अपार गुरुत्वाकर्षण से फट जाता है। हमारे पास अभी भी कई सवाल हैं कि WD 1856 b वर्तमान स्थिति में कैसे आया, उनमें से किसी एक से मुलाकात किए बिना। । “

जर्नल नेचर में छपे अध्ययन के लिए, शोधकर्ताओं ने नासा के ट्रांसिटिंग एक्सोप्लेनेट सर्वे सैटेलाइट (TESS) और सेवानिवृत्त स्पिट्जर स्पेस टेलीस्कोप का इस्तेमाल किया।

TESS एक महीने में लगभग एक महीने तक आकाश के बड़े-बड़े क्षेत्रों की निगरानी करता है, जिन्हें सेक्टर कहा जाता है।

यह लंबी टकटकी उपग्रह को हमारे सौर मंडल से परे एक्सोप्लेनेट्स या दुनिया को खोजने की अनुमति देता है, तारकीय चमक में परिवर्तन को कैप्चर करके, जब कोई ग्रह अपने तारे के सामने से गुजरता है या पार करता है।

उपग्रह ने डब्ल्यूटी 1856 बी को उत्तरी नक्षत्र ड्रेको में लगभग 80 प्रकाश-वर्ष दूर देखा।

यह एक शांत, शांत सफेद बौना है, जो लगभग 18,000 किलोमीटर की दूरी पर स्थित है, यह 10 अरब साल पुराना हो सकता है, और एक ट्रिपल स्टार सिस्टम का दूर का सदस्य है।

जब एक सूर्य जैसा तारा ईंधन से बाहर निकलता है, तो वह अपने मूल आकार से सैकड़ों से हजारों गुना तक सूज जाता है, जिससे एक लाल रंग का विशालकाय तारा बन जाता है। आखिरकार, यह गैस की अपनी बाहरी परतों को खारिज कर देता है, अपने द्रव्यमान का 80 प्रतिशत तक खो देता है।

शेष गर्म कोर एक सफेद बौना बन जाता है। आस-पास की कोई भी वस्तु आमतौर पर इस प्रक्रिया के दौरान उकसाया और उकसाया जाता है, जो इस प्रणाली में WD 1856 b को अपनी वर्तमान कक्षा में शामिल करता है।

शोधकर्ताओं का अनुमान है कि संभव ग्रह की उत्पत्ति वर्तमान स्थान से कम से कम 50 गुना दूर होनी चाहिए।

टीम ने स्पिट्जर का उपयोग करते हुए इन्फ्रारेड में सिस्टम का अवलोकन किया, कुछ महीने पहले ही दूरबीन का डिमोशन किया गया था।

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//$(“.main-rhs” + x).theiaStickySidebar();
var fb_script=document.createElement(‘script’);
fb_script.text= “(function(d, s, id) {var js, fjs = d.getElementsByTagName(s)[0];if (d.getElementById(id)) return;js = d.createElement(s); js.id = id;js.src=”https://connect.facebook.net/en_GB/sdk.js#xfbml=1&version=v2.9″;fjs.parentNode.insertBefore(js, fjs);}(document, ‘script’, ‘facebook-jssdk’));”;
var fmain = $(“.sr”+ x);
//alert(x+ “-” + url);
var fdiv = ‘

‘;
//$(fb_script).appendTo(fmain);
$(fdiv).appendTo(fmain);
FB.XFBML.parse();
var $dfpAd = $(‘.center-section’).children().find(“#ad-“+ x);
xp = “#star”+x;

//var $dfpAdrhs = $(‘.main-rhs’ + x).children().find(‘.adATF’).empty().attr(“id”, “ad-300-” + x); //$(‘.content-area > .main-article > .row > .main-rhs’+x).find(‘#ad-300-‘ + x);
//var $dfpAdrhs2 = $(‘.main-rhs’ + x).children().find(‘.adBTF’).empty().attr(“id”, “ad-300-2-” + x);//$(‘.content-area > .main-article > .row > .main-rhs’+x).find(‘#ad-300-2-‘ + x);
//var $dfpMiddleAd = $(‘.content-area > .main-article > .row’).find(‘#ar’+x).find(‘#ad-middle-‘ + x).empty();
//fillElementWithAd($dfpAdrhs, ‘/11440465/Zeenews_English_Web/Zeenews_English_AS_ATF_300x250’, [[300, 250], [300, 600]], {});
//fillElementWithAd($dfpAdrhs2, ‘/11440465/Zeenews_English_Web/Zeenews_English_AS_BTF_1_300x250’, [300, 250], {});
//fillElementWithAd($dfpMiddleAd, ‘/11440465/Zeenews_Hindi_Article_Middle_300x250_BTF’, [300, 250], {});
var instagram_script=document.createElement(‘script’);
instagram_script.defer=”defer”;
instagram_script.async=”async”;
instagram_script.src=”https://platform.instagram.com/en_US/embeds.js”;

/*var outbrain_script=document.createElement(‘script’);
outbrain_script.type=”text/javascript”;
outbrain_script.async=”async”;
outbrain_script.src=”https://widgets.outbrain.com/outbrain.js”;
var Omain = $(“#outbrain-“+ x);
//alert(Omain + “–” + $(Omain).length);

$(Omain).after(outbrain_script);
var rhs = $(‘.main-article > .row > div.article-right-part > div.rhs2310353:first’).clone();
$(rhs).find(‘.ad-one’).attr(“id”, “ad-300-” + x).empty();
$(rhs).find(‘.ad-two’).attr(“id”, “ad-300-2-” + x).empty();
//$(‘.main-article > .row > div.article-right-part > div.rhs2310353:first’).clone().appendTo(‘.main-article > .row > div.main-rhs’ + x);
$(rhs).appendTo(‘.main-article > .row > div.main-rhs’ + x); */

setTimeout(function(){

var twit = $(“div.field-name-body”).find(‘blockquote[class^=”twitter”]’).length;
var insta = $(“div.field-name-body”).find(‘blockquote[class^=”instagram”]’).length;
if(twit==0){twit = ($(“div.field-name-body”).find(‘twitterwidget[class^=”twitter”]’).length);}
if(twit>0){
if (typeof (twttr) != ‘undefined’) {
twttr.widgets.load();

} else {
$.getScript(‘https://platform.twitter.com/widgets.js’);
}
//$(twit).addClass(‘tfmargin’);
}
if(insta>0){
$(‘.content > .left-block:last’).after(instagram_script);
//$(insta).addClass(‘tfmargin’);
window.instgrm.Embeds.process();
}
}, 1500);
}
});
/*$(“#loadmore”).click(function(){
x=$(next_selector).attr(‘id’);
var url = $(next_selector).attr(‘href’);
disqus_identifier=”ZNH” + x;
disqus_url = url;
handle.autopager(‘load’);
history.pushState(” ,”, url);
setTimeout(function(){
//twttr.widgets.load();
//loadDisqus(jQuery(this), disqus_identifier, disqus_url);
}, 6000);
});*/

/*$(“button[id^=’mf’]”).live(“click”, disqusToggle);
function disqusToggle() {
console.log(“Main id: ” + $(this).attr(‘id’));
}*/
$(document).delegate(“button[id^=’mf’]”, “click”, function(){
fbcontainer=””;
fbid = ‘#’ + $(this).attr(‘id’);
var sr = fbid.replace(“#mf”, “.sr”);

//console.log(“Main id: ” + $(this).attr(‘id’) + “Goodbye!jQuery 1.4.3+” + sr);
$(fbid).parent().children(sr).toggle();
fbcontainer = $(fbid).parent().children(sr).children(“.fb-comments”).attr(“id”);
//console.log(fbcontainer);
//var commentsContainer = document.getElementById(fbcontainer);
//commentsContainer.innerHTML = ”;

});
/************Player Code ***********/
var title, imageUrl, description, author, shortName, identifier, timestamp, summary, newsID, nextnews;
var previousScroll = 0;
//console.log(“prevLoc” + prevLoc);
$(window).scroll(function(){
var last = $(auto_selector).filter(‘:last’);
var lastHeight = last.offset().top ;
//st = $(layout).scrollTop();
//console.log(“st:” + st);
var currentScroll = $(this).scrollTop();
if (currentScroll > previousScroll){
_up = false;
} else {
_up = true;
}
previousScroll = currentScroll;
//console.log(“_up” + _up);

var cutoff = $(window).scrollTop() + 64;
//console.log(cutoff + “**”);
$(‘div[id^=”row”]’).each(function(){
//console.log(“article” + $(this).children().find(‘.left-block’).attr(“id”) + $(this).children().find(‘.left-block’).attr(‘data-url’));
if($(this).offset().top + $(this).height() > cutoff){
//console.log(“$$” + $(this).children().find(‘.left-block’).attr(‘data-url’));
if(prevLoc != $(this).children().find(‘.left-block’).attr(‘data-url’)){
prevLoc = $(this).children().find(‘.left-block’).attr(‘data-url’);
$(‘html head’).find(‘title’).text($(this).children().find(‘.left-block’).attr(‘data-title’));
$(‘meta[name=description]’).attr(“content”,$(this).children().find(‘.left-block’).attr(‘data-summary’));
$(‘meta[name=keywords]’).attr(“content”,$(this).children().find(‘.left-block’).attr(‘data-keyword’));
$(‘meta[name=news_keywords]’).attr(“content”,$(this).children().find(‘.left-block’).attr(‘data-keyword’));

pSUPERFLY.virtualPage(prevLoc,$(this).children().find(‘.left-block’).attr(‘data-title’));
//console.log(“Summary: ” + $(this).children().find(‘.left-block’).attr(‘data-summary’));
//console.log(“Keyword: ” + $(this).children().find(‘.left-block’).attr(‘data-keyword’));
//history.pushState(” ,”, prevLoc);
loadshare(prevLoc);
}
return false; // stops the iteration after the first one on screen
}
});
if(lastHeight + last.height() < $(document).scrollTop() + $(window).height()){
//console.log("**get");
url = $(next_selector).attr('href');
x=$(next_selector).attr('id');
//console.log("x:" + x);
//handle.autopager('load');

/*setTimeout(function(){
//twttr.widgets.load();
//loadDisqus(jQuery(this), disqus_identifier, disqus_url);
}, 6000);*/
}
//lastoff = last.offset();
//console.log("**" + lastoff + "**");
});
//$( ".content-area" ).click(function(event) {
// console.log(event.target.nodeName);
//});

/*$( ".comment-button" ).live("click", disqusToggle);
function disqusToggle() {
var id = $(this).attr("id");
$("#disqus_thread1" + id).toggle();
};*/
//$(".main-rhs2310353").theiaStickySidebar();
var prev_content_height = $(content_selector).height();
//$(function() {
var layout = $(content_selector);
var st = 0;
///});

}
}
});

/*}
};*/
})(jQuery);

(function() {
var reset_scroll;

$(function() {
return $(“[data-sticky_column]”).stick_in_parent({
parent: “[data-sticky_parent]”
});
});

reset_scroll = function() {
var scroller;
scroller = $(“body,html”);
scroller.stop(true);
if ($(window).scrollTop() !== 0) {
scroller.animate({
scrollTop: 0
}, “fast”);
}
return scroller;
};

window.scroll_it = function() {
var max;
max = $(document).height() – $(window).height();
return reset_scroll().animate({
scrollTop: max
}, max * 3).delay(100).animate({
scrollTop: 0
}, max * 3);
};

window.scroll_it_wobble = function() {
var max, third;
max = $(document).height() – $(window).height();
third = Math.floor(max / 3);
return reset_scroll().animate({
scrollTop: third * 2
}, max * 3).delay(100).animate({
scrollTop: third
}, max * 3).delay(100).animate({
scrollTop: max
}, max * 3).delay(100).animate({
scrollTop: 0
}, max * 3);
};

$(window).on(“resize”, (function(_this) {
return function(e) {
return $(document.body).trigger(“sticky_kit:recalc”);
};
})(this));

}).call(this);

body{overflow:hidden}
.article-tag-link{margin:5px 0px;padding:0px;font-size:14px;font-weight:700;color:#e21727;text-transform:uppercase;}
.article-tag-link a{color:#e21727;}
.article-widgetpara{font-size:38px;color:#191c20;line-height:normal;margin-bottom:10px;}
.article-widgetpara a{font-size:38px;color:#191c20;line-height:normal;}
.widget-image-block{position:relative;height:270px;overflow:hidden;}
.stry_ldmore{width:100%;position:absolute;bottom:0px;text-align:center;display:block;}
.stry_fdr{bottom:0;background:linear-gradient(to bottom, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 1) 100%) repeat scroll 0 0 rgba(0, 0, 0, 0);height:200px;position:absolute;width:100%;}
.stry_shwmre{background:#2089ff;color:#FFF;cursor:pointer;padding:10px 20px;text-align:center;position:relative;display:inline-block;left:50%;margin-left:-83px;border-top-left-radius:5px;border-top-right-radius: 5px;}
.stry_shwmre:hover{background:#1581f9}
.wid-line{border-bottom:1px solid #2089ff; position:absolute;bottom:0;width:100%;}
.widget-vs{padding-left:inherit;padding-right:inherit;}
.white-txt{color:#FFF !important;}
.article-head-block p{font-size:18px;color:#444;line-height:26px}
.play-b{width:70px;height:70px;top:50%;left:50%;position:absolute;z-index:1009;cursor:pointer;margin-left:-35px;margin-top:-35px;bottom:inherit;right:inherit;}

.kaltura-player-container{position: relative; top: 0px; right: 0; bottom: 0; left: 0; width: 100%; height: 500px;}
.playkit-player-gui{display:block !important;}

function on_load_google_ad(){
var inad1, inad2 = ”;
googletag.cmd.push(function() {
googletag.defineSlot(‘/11440465/Zeenews_English_Web/Zeenews_English_AS_ATF_970x90’, [[970, 90], [970, 250], [970, 66], [728, 90]], ‘div-gpt-ad-1504525832454-0’).addService(googletag.pubads().setTargeting(‘category’, [“Science & Environment”,”Survivor Planet”,”White Dwarf Star”,”NASA”,”WD 1856 B”]));
googletag.defineSlot(‘/11440465/Zeenews_English_Web/Zeenews_English_AS_ATF_300x250’, [[300, 600], [300, 250]], ‘div-article-rhs-atf-ad’).addService(googletag.pubads().setTargeting(‘category’, [“Science & Environment”,”Survivor Planet”,”White Dwarf Star”,”NASA”,”WD 1856 B”]));
googletag.defineSlot(‘/11440465/Zeenews_English_Web/Zeenews_English_AS_BTF_1_300x250’, [300, 250], ‘div-gpt-ad-1504525832454-2’).addService(googletag.pubads().setTargeting(‘category’, [“Science & Environment”,”Survivor Planet”,”White Dwarf Star”,”NASA”,”WD 1856 B”]));
googletag.defineSlot(‘/11440465/Zeenews_English_Web/Zeenews_English_AS_OOP_1x1’, [1, 1], ‘div-gpt-ad-1504526235866-6’).addService(googletag.pubads().setTargeting(‘category’, [“Science & Environment”,”Survivor Planet”,”White Dwarf Star”,”NASA”,”WD 1856 B”]));
var inarticle1 = document.getElementById(‘div-gpt-ad-AS-Inarticle-1’);
if (typeof(inarticle1) != ‘undefined’ && inarticle1 != null)
{
googletag.defineSlot(‘/11440465/Zeenews_English_Web/Zeenews_English_AS_Inarticle_1_300x250’, [[300, 250]], ‘div-gpt-ad-AS-Inarticle-1’).addService(googletag.pubads().setTargeting(“category”, [“Science & Environment”,”Survivor Planet”,”White Dwarf Star”,”NASA”,”WD 1856 B”]));
inad1 = “true”;
}
var inarticle2 = document.getElementById(‘div-gpt-ad-AS-Inarticle-2’);
if (typeof(inarticle2) != ‘undefined’ && inarticle2 != null)
{
googletag.defineSlot(‘/11440465/Zeenews_English_Web/Zeenews_English_AS_Inarticle_2_300x250’, [[300, 250]], ‘div-gpt-ad-AS-Inarticle-2’).addService(googletag.pubads().setTargeting(“category”, [“Science & Environment”,”Survivor Planet”,”White Dwarf Star”,”NASA”,”WD 1856 B”]));
inad2 = “true”;
}
googletag.pubads().disableInitialLoad();
googletag.pubads().enableAsyncRendering();
googletag.pubads().set(‘page_url’,’https://zeenews.india.com/’);
googletag.pubads().enableSingleRequest();
googletag.pubads().collapseEmptyDivs();
googletag.enableServices();
});
googletag.cmd.push(function() { googletag.display(‘div-article-rhs-atf-ad’); });
googletag.cmd.push(function() { googletag.display(‘div-gpt-ad-1504525832454-0’); });
googletag.cmd.push(function() { googletag.display(‘div-gpt-ad-1504525832454-2’); });
googletag.cmd.push(function() { googletag.display(‘div-gpt-ad-1504526235866-6’); });

}
on_load_google_ad();
function sendAdserverRequest() {
try {
if (pbjs && pbjs.adserverRequestSent) return;
googletag.cmd.push(function() {
googletag.pubads().refresh();
});
} catch (e) {

googletag.cmd.push(function() {
googletag.pubads().refresh();
});
}
}
setTimeout(function() { sendAdserverRequest(); }, 5000);

function on_load_fb_twitter_widgets(){
(function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) return;
js = d.createElement(s); js.id = id;
js.src = “https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.9”;
fjs.parentNode.insertBefore(js, fjs);
}(document, ‘script’, ‘facebook-jssdk’));

window.twttr = (function(d, s, id) {
var js, fjs = d.getElementsByTagName(s)[0],
t = window.twttr || {};
if (d.getElementById(id)) return t;
js = d.createElement(s);
js.id = id;
js.src = “https://platform.twitter.com/widgets.js”;
fjs.parentNode.insertBefore(js, fjs);
t._e = [];
t.ready = function(f) {

t._e.push(f);
};
return t;
}(document, “script”, “twitter-wjs”));
}

//setTimeout(function() { on_load_google_ad(); }, 5000);
setTimeout(function() {
on_load_fb_twitter_widgets();
}, 5000);

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