Sebuah Bintang Meledak dalam 3 Bulan, Hasilkan Bintang Baru (2024)

Kompas.com - 07/06/2024, 20:44 WIB

Annisa Fakhira Mulya Wahyudi,
Resa Eka Ayu Sartika

Tim Redaksi

Annisa Fakhira Mulya Wahyudi Penulis Resa Eka Ayu Sartika Editor

Sebuah Bintang Meledak dalam 3 Bulan, Hasilkan Bintang Baru (1)

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Corona Borealis, tempat munculnya Blaze Star, dapat ditemukan di antara konstelasi Hercules dan Bootes.()

Sumber NASA,Forbes

KOMPAS.com -Untuk pertama kalinya dalam 80 tahun, fenomena langit akan menghiasi langit malam kita. Ini akan menjadi kesempatan sekali seumur hidup untuk melihat ledakan besar bintang dengan mata telanjang.

Bintang ini, yang disebut T Coronae Borealis, atau T CrB, berada di belahan bumi utara, 3.000 tahun cahaya dari Bumi. Benda langit tersebut berada di ambang ledakan hebat.

Baca juga: Berapa Banyak Bintang yang Mati di Galaksi Bima Sakti Setiap Tahun?

Ledakan bintang Borealis

Menurut NASA, "Blaze Star", yang secara resmi disebut T Coronae Borealis (T CrB), diperkirakan akan bersinar secara signifikan dari magnitudo +10 (di luar jarak pandang mata telanjang) hingga magnitudo +2 antara sekarang dan September 2024.

Kecerahannya hampir sama dengan bintang paling terang ke-48 di langit malam, Polaris. (Dalam astronomi, magnitudo suatu benda lebih kecil ketika lebih terang; misalnya, magnitudo bulan purnama adalah -12,6).

Mahkota Utara, juga disebut Corona Borealis, adalah konstelasi kecil di belahan bumi utara. Busur bintang setengah lingkaran yang menyerupai mahkota ada di dalamnya.

Alphecca atau Gemma, yang merupakan sistem bintang biner gerhana, adalah bintang paling terang di konstelasi tersebut.

T CrB, nova berulang yang terletak di konstelasi Corona Borealis, terdiri dari katai putih dan bintang raksasa merah yang mengorbit berdekatan.

Ini adalah ledakan berulang

Ledakan yang akan segera terjadi, yang disebut nova, adalah peristiwa langit yang jarang terjadi yang terjadi kira-kira setiap abad.

Baca juga: Supernova, Fenomena Ledakan Bintang di Akhir Hidupnya

Ini terjadi ketika bintang katai putih runtuh, yang memiliki ukuran sebanding dengan Matahari, dan bintang raksasa merah, yang mendekati akhir masa hidupnya dan mengembang hingga sekitar 74 kali ukuran Matahari.

Suhu permukaan bintang raksasa merah meningkat secara signifikan dari sekitar 4.000 hingga 5.800 derajat Fahrenheit menjadi 360.000 derajat Fahrenheit sebagai akibat dari kedekatan ini. Ini mendorong T CrB untuk melepaskan lapisan luarnya dari permukaan katai putih.

Puncak materi raksasa merah ini memicu ledakan nuklir yang menghasilkan jumlah energi hingga 100.000 kali lebih banyak daripada yang dihasilkan oleh matahari setiap tahunnya.

Nova seperti T CrB tidak menghancurkan sistem bintang seperti supernova yang melenyapkannya. Sebaliknya, bintang mendingin ke suhu semula dan memulai kembali siklusnya.

Ledakan bintang khusus ini unik karena tampilannya yang singkat tetapi intens, menyelesaikan siklusnya hanya dalam waktu seminggu.

NASA mengantisipasi bahwa puncak kecerahan nova akan memungkinkannya terlihat dengan mata telanjang selama beberapa hari, dan dengan teropong selama lebih dari seminggu, sebelum memudar, dan berpotensi tidak muncul kembali selama 80 tahun berikutnya.

Baca juga: Salah Satu Bintang Tertua Ditemukan di Dekat Galaksi Bimasakti

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  • supernova
  • ledakan bintang
  • bintang
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`); var wSpecStop = createElementFromHTML(`

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Muat ulang halaman untuk perbarui rekomendasi.

`); reactionPopup.querySelector('.buttonShare').setAttribute('data-title', item.title); reactionPopup.querySelector('.buttonShare').setAttribute('data-url', itemUrl); reactionPopup.querySelector('.buttonShare').setAttribute('data-campaign', 'AIML_Widget_Desktop'); let userFeedback = new UserFeedback(resultObj.engine['tracker_algsrc'], itemUrl + tracker_params, jxRecHelper, index); reactionPopup.querySelector('.buttonBookmark').addEventListener('click', function() { do_bookmark(itemUrl, index, userFeedback); }); reactionPopup.querySelector('.buttonShare').addEventListener('click', function() { userFeedback.event('share'); }); reactionPopup.querySelector('.buttonNotInterest').addEventListener('click', function() { if (getCookie('kmps_usrid')) { hideThisArt(this); userFeedback.event('not-interested'); } else { const parentAction = this.parentElement.parentElement.parentElement if (!!parentAction) { let indexElement = parentAction.getAttribute('data-index') if (indexElement != 'undefined') { localStorage.setItem('reaction_not_interest_temp', JSON.stringify({ urlpage: items[indexElement].url })) } } window.location.href = "https://account.kompas.com/login/a29tcGFz/" + btoa(window.location.href); } }); /** * trigger action "userFeedback" that user not interest item before, when not interest without login */ if (getCookie('kmps_usrid') && localStorage.getItem('reaction_not_interest_temp')) { const tempUrlNotInterest = JSON.parse(localStorage.getItem('reaction_not_interest_temp')) if (itemUrl == tempUrlNotInterest.urlpage) { userFeedback.event('not-interested'); localStorage.removeItem('reaction_not_interest_temp'); } } wSpecStop.querySelector('.wSpec-stop-undo').addEventListener('click', function() { showThisArt(this); userFeedback.event('un-not-interested'); }); recItem.appendChild(buttonOption); recItem.appendChild(reactionPopup); recItem.appendChild(wSpecStop); } var recItemWrapperA = createElement('a', null, null, null); recItemWrapperA.setAttribute('href', itemUrl + tracker_params); var titleDiv = createElement('h4', null, null, [cssClasses.title]); var titleTextNode = document.createTextNode(item.title); if (item.itemType == 'video') { var iconVideo = createElement('div', null, null, ['icoInline', 'icoVideo']); iconVideo.style.marginRight = '5px'; titleDiv.appendChild(iconVideo); } titleDiv.appendChild(titleTextNode); var sourceDiv = null; if (item.hasOwnProperty('method')) { sourceDiv = createElement('div', null, null, [cssClasses.source], resultObj.engine['type'] + ' . ' + item.method.toUpperCase()); } else { var sourceDiv = createElement('div', null, null, [cssClasses.source], resultObj.engine['type']); } var textWrapper = createElement('div', null, null, [cssClasses.text_wrapper]); textWrapper.appendChild(categoryDiv); textWrapper.appendChild(titleDiv); textWrapper.appendChild(sourceDiv); recItemWrapper.appendChild(imgWrapper); recItemWrapper.appendChild(textWrapper); recItemWrapperA.appendChild(recItemWrapper); recItem.appendChild(recItemWrapperA); widgetWrapper.appendChild(recItem); // hook up the click handler for this item // recItem.onclick = handleClick.bind(null, jxRecHelper, itemUrl + tracker_params, index); recItemWrapperA.onclick = handleClick.bind(null, jxRecHelper, itemUrl + tracker_params, index); }); } // end while var endDate = new Date(); var loadtime = (endDate.getTime() - startDate.getTime()); trackEventGa('AIML Article Recommendation', 'Content Loaded', 'algsrc='+algsrc+',site=SAINS,device=desktop,loadtime=' + loadtime) let domain = window.location.hostname; if(domain=='www.kompas.com'){ var url=window.location.href.split("/"); domain=url[2]+'/'+url[3] } let user_subs_type = "Gues"; let subs_type = ""; let is_lgn = 0; let engine = algsrc; if(getCookie('kmps_usrid')){is_lgn=1}; let time_load = loadtime; resolve(); /*** * JXRECSDK NOTES 3 of 5 - * pass all the info about the items to the rec helper * each one is an object: ALL MANDATORY * div * id * pos */ jxRecHelper.items(widgetItemArr); /*** * JXRECSDK NOTES 4 of 5 - * Call the ready() of the helper object when the recommendation * results have been populated to the widget * (This will register the action=ready event) */ if (resultObj.engine['type'] == 'api-1') { jxRecHelper.ready(resultObj.options.algo + ":" + resultObj.options.version); } else { jxRecHelper.ready(resultObj.engine['type']); } } else { jxRecHelper.error(204); console.error("Error: no recommendation items"); return; } } catch (err) { jxRecHelper.error(901); console.log(err.stack); let domain = window.location.hostname; if(domain=='www.kompas.com'){ var url=window.location.href.split("/"); domain=url[2]+'/'+url[3] } let user_subs_type = "Gues"; let subs_type = "" let is_lgn = 0; let engine = algsrc; if(getCookie('kmps_usrid')){is_lgn=1}; let endDate = new Date(); let time_load = (endDate.getTime() - startDate.getTime()); } }); } const _jxRecSdkURL = 'https://scripts.jixie.media/jxrecsdk.1.0.min.js'; var startDate = new Date(); class OneWidget { constructor() { //this is also the one we will pass to the JX rec helper object when //we instantiate it: //In this implementation most of these come from the options obj //on the publisher page. this._options = { accountid: '9262bf2590d558736cac4fff7978fcb1', pageurl: 'https://www.kompas.com/sains/read/2024/06/07/204403323/sebuah-bintang-meledak-dalam-3-bulan-hasilkan-bintang-baru', widget_id: '1000183-6xWeiWZFIM', type: 'pages', container: 'rekomendasi-konten-pilihan-untukmu-aiml', keywords: content_tags, title: title, customid: "23", count: 14, }; this._containerId = this._options.container; this._container = document.getElementById(this._containerId); this._engines = [{"url":"https:\/\/recommendation.jixie.media\/v1\/recommendation","method":"GET","pageurl":"https:\/\/www.kompas.com\/sains\/read\/2024\/06\/07\/204403323\/sebuah-bintang-meledak-dalam-3-bulan-hasilkan-bintang-baru","system":"jx","type":"api-1","tracker_params":"?source=widgetML","tracker_algsrc":"V","count":14,"page_status":"read","excludeitemids":"20240607204403323"}]; } kickOff() { startDate = new Date(); const rand = Math.floor(Math.random() * 1000); /*const randSystem = Math.floor(Math.random() * 3); this._engine = this._engines[randSystem] if (location.hostname.indexOf('lestari') != -1) { this._engine = this._engines[1] }*/ this._engine = this._engines[0]; this._options.system = this._engine['system'] trackEventGa('AIML Article Recommendation', 'Widget load', 'algsrc=' + this._engine['tracker_algsrc'] + ',site=SAINS,device=desktop') let promJXSDK = fetchJSFileP(_jxRecSdkURL); let thisObj = this; // first we wait on the JX REC SDK to be loaded and initialized let recHelperObj = null; let recResults = null; promJXSDK .then(function() { /*** * JXRECSDK NOTES 1 of 5 - INSTANTIATION OF A JX REC HELPER OBJECT * Call this AFTER JX REC SDK is loaded but BEFORE you call your REC * backend. * * param: MANDATORY options object * options object must at a minimal have * accountid: get from jixie * widgetid: get from jixie * container: DIV ID of the destination div to house the widget * (for jixie widget this is just the options object passed from the page) * * (This will also register the action=load event) */ recHelperObj = jxRecMgr.createJxRecHelper(thisObj._options); let basicInfo = thisObj._options; basicInfo.engine = thisObj._engine if (basicInfo.engine.type == 'api-1') { var options = { count: basicInfo['count'], adpositions: "", keywords: basicInfo['keywords'], title: basicInfo['title'], date_published: "2024-06-07", pagecategory: "SAINS", algo: "mixed" }; if(getCookie('kmps_usrid')){ var kg = { pagetype:basicInfo.engine.page_status, uid:getCookie('kmps_usrid'), ukid:getCookie('kmp_uid') } if(basicInfo.engine.page_status=='read'){ kg['excludeitemids'] = basicInfo.engine.excludeitemids; kg['multiFormat'] = true; } options['additional'] = { kg:kg }; } return recHelperObj.getJxRecommendations(options); } else { return fetchRecommendationsP(basicInfo, recHelperObj.getJxUserInfo()); } }) .then(function(resp) { if (thisObj._engine.type == 'api-3') { recResults = new Object recResults.items = resp.docs.result; } else { recResults = resp; } recResults.engine = thisObj._engine; if (!resp || !recResults.items || recResults.items.length == 0) { /*** * JXRECSDK NOTES 2 of 5 - * Call the error() function on the recHelper when either an error * has occured in the fetching or there are no recommended items * * (This will register the action=error event) */ recHelperObj.error(204); throw "no recommendation results"; } }) .then(function() { // everything is ready (recommendation results, css): document.getElementById("rekomendasi-konten-pilihan-untukmu-aiml").classList.remove("-loading"); document.querySelector('.wSpec-list').remove(); createDisplay(rand, thisObj._container, recResults, recHelperObj) .then(function() { toggleDropdown(); //observe lozad lozad('.lozad', { load: function(el) { el.src = el.dataset.src; el.onload = function() { el.classList.add('fade') } } }).observe() }) }) .catch(function(error) { console.log(`Unable to create recommendations widget ${error.stack} ${error.message}`); }); } } var limit_gtm_ready = 1; function check_gtm_ready() { if ('ga' in window) { // create a new instance of our widget based on the options const newW = new OneWidget(); newW.kickOff(); } else { const timeout_gtm_ready = setTimeout(check_gtm_ready, 500) limit_gtm_ready += 1; if (limit_gtm_ready > 10) { clearTimeout(timeout_gtm_ready); const newW = new OneWidget(); newW.kickOff(); } } } check_gtm_ready() document.querySelector('.wSpec-secret').addEventListener('click', function(e) { e.preventDefault(); let wSl = document.querySelectorAll('.wSpec-source'); if (wSl.length > 0) { for (let i = 0; i < wSl.length; i++) { wSl[i].classList.toggle('show') } } }) function trackEventGa(category, action, label) { if ("ga" in window) { ga(function() { tracker = ga.getAll()[0]; if (tracker) { tracker.send("event", category, action, label); console.log('track event ', category, action, label) } }) } } function formBody(obj) { let formBody = []; for (var property in obj) { let encodedKey = encodeURIComponent(property); let encodedValue = encodeURIComponent(obj[property]); formBody.push(encodedKey + "=" + encodedValue); } return formBody.join("&"); } function getCookie(name) { var name = name + '='; var cookies = decodeURIComponent(document.cookie).split(';'); for (var i = 0; i < cookies.length; i++) { var c = cookies[i]; while (c.charAt(0) == ' ') { c = c.substring(1); } if (c.indexOf(name) == 0) { return c.substring(name.length, c.length); } } } function get_guid(url) { const videoPath = url.match(/\/watch\/(\d+)/); if (videoPath) { return `video.${videoPath[1]}`; } let arrayUrl = url.split('/'); let readPath = arrayUrl.indexOf('read'); if (arrayUrl[readPath + 1] == 'xml') { readPath += 1; } let year = arrayUrl[readPath + 1]; let month = arrayUrl[readPath + 2]; let date = arrayUrl[readPath + 3]; let id = arrayUrl[readPath + 4]; let guid = `.xml.${year}.${month}.${date}.${id}`; return guid; } function toggleDropdown() { let tdd = document.querySelectorAll('[data-dropdown]') if (!!tdd) { tdd.forEach((el) => { el.addEventListener('click', function() { el.parentElement.classList.toggle('-active') let saved = el.parentElement.getAttribute('data-saved') let kmps_usrid = getCookie('kmps_usrid'); if (kmps_usrid && !saved && el.parentElement.classList.contains('-active')) { let url = el.parentElement.getAttribute('data-url'); let guid = get_guid(url); check_bookmark( kmps_usrid, guid ).then(function(resp) { if (resp.hasOwnProperty('total_data')) { if (resp.total_data > 0) { el.parentElement.querySelector('.buttonBookmark').classList.add('-active'); el.parentElement.querySelector('.buttonBookmark').innerHTML = 'Hapus dari tersimpan'; el.parentElement.setAttribute('data-saved', 'true'); } else { el.parentElement.setAttribute('data-saved', 'false'); } } }) } }) document.addEventListener("click", function(e) { // console.log(e.target) if (el.contains(e.target)) { // console.log(tdd) } else { el.parentElement.classList.remove('-active') } }); }); } } function check_bookmark(kmps_usrid, guid) { let url = `https://api.kompas.com/2021/reaction/bookmark/list?kmps_usrid=${kmps_usrid}&guid=${guid}`; return new Promise(function(resolve, reject) { var xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { resolve(JSON.parse(this.responseText)) } }; xmlhttp.open("GET", url, true); xmlhttp.send(); }); } function do_bookmark(pageurl, pos, userFeedback) { const wSpecItem = document.querySelector(`.wSpec-item[data-index="${pos}"]`); const btnBookmark = wSpecItem.querySelector('.buttonBookmark'); const kmps_usrid = getCookie('kmps_usrid'); const guid = get_guid(pageurl); const type = pageurl.match(/\/watch\/(\d+)/) ? 'video' : 'article'; if (kmps_usrid) { if (btnBookmark.classList.contains('-active')) { set_unbookmark({ guid: guid, kmps_usrid: kmps_usrid, type: type }).then(function(resp) { btnBookmark.classList.remove('-active'); btnBookmark.innerHTML = 'Simpan artikel'; reactionToast('Artikel berhasil dihapus dari list yang disimpan'); userFeedback.event('un-save'); }).catch(function(resp) { // message: "Data doesn't exists" if (resp.hasOwnProperty('message') && resp.message.includes('exist')) { btnBookmark.classList.remove('-active'); btnBookmark.innerHTML = 'Simpan artikel'; reactionToast('Artikel berhasil dihapus dari list yang disimpan'); } }) } else { const user_bookmark_url = "https://activity.kompas.com/saved?order=desc"; set_bookmark({ guid: guid, kmps_usrid: kmps_usrid, type: type, publisher: 'kompas', platform: 'desktop' }).then(function(resp) { btnBookmark.classList.add('-active'); btnBookmark.innerHTML = 'Hapus dari tersimpan'; reactionToast('Artikel berhasil disimpan', user_bookmark_url); userFeedback.event('save'); }).catch(function(resp) { // message: "Data already exist" if (resp.hasOwnProperty('message') && resp.message.includes('exist')) { btnBookmark.classList.add('-active'); btnBookmark.innerHTML = 'Hapus dari tersimpan'; reactionToast('Artikel berhasil disimpan', user_bookmark_url); } }) } } else { const login_url = "https://account.kompas.com/login/a29tcGFz/" + btoa(window.location.href); window.location.href = login_url; } } function set_bookmark(data) { const url = "https://api.kompas.com/2021/reaction/bookmark/add"; return new Promise(function(resolve, reject) { const xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 201) { resolve(JSON.parse(this.responseText)); } else if (this.readyState == 4 && this.status == 400) { reject(JSON.parse(this.responseText)); } }; xmlhttp.open("POST", url, true); xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8"); xmlhttp.send(formBody(data)); }); } function set_unbookmark(data) { const url = "https://api.kompas.com/2021/reaction/bookmark/delete"; return new Promise(function(resolve, reject) { const xmlhttp = new XMLHttpRequest(); xmlhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { resolve(JSON.parse(this.responseText)); } else if (this.readyState == 4 && this.status == 400) { reject(JSON.parse(this.responseText)); } }; xmlhttp.open("POST", url, true); xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8"); xmlhttp.send(formBody(data)); }); } class UserFeedback { constructor(engine, pageurl, jxRecHelper, pos) { this.engine = engine; this.pageurl = pageurl; this.jxRecHelper = jxRecHelper; this.pos = pos; } event(feedback) { if (this.engine == 'C') { const xmlhttp = new XMLHttpRequest(); let params = { domain: 'kompas.com', ce_userid: getCookie('kmps_usrid'), ce_sessionid: getCookie('ukid'), ce_pageurl: this.pageurl, engine: 'C', ce_feedback: feedback } xmlhttp.open("GET", 'https://apis.kgdata.dev/v1/aiml/feedback-widgetml' + formatParams(params)); xmlhttp.send(); } else if (this.engine == 'V') { if (feedback == 'share') { this.jxRecHelper.shared(this.pos); } else if (feedback == 'save') { this.jxRecHelper.bookmarked(this.pos); } else if (feedback == 'not-interested') { this.jxRecHelper.hidden(this.pos); } else if (feedback == 'un-not-interested') { this.jxRecHelper.unhidden(this.pos); } } } } function formatParams(params) { return "?" + Object .keys(params) .map(function(key) { return key + "=" + encodeURIComponent(params[key]) }) .join("&") } document.addEventListener("click", function(e){ let dx = document.querySelectorAll('[data-dropdown]') if(dx) { dx.forEach(function(el){ if(el.contains(e.target)) { el.parentElement.classList.toggle('-active') } else { el.parentElement.classList.remove('-active') } }) } })

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Sebuah Bintang Meledak dalam 3 Bulan, Hasilkan Bintang Baru (2024)

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