{"id":827735,"date":"2026-08-27T16:16:11","date_gmt":"2026-08-27T16:16:11","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/827735\/"},"modified":"2026-08-27T16:16:11","modified_gmt":"2026-08-27T16:16:11","slug":"the-most-beautiful-nebulae-of-universe-episode-7-the-necklace-nebula","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/827735\/","title":{"rendered":"The most beautiful Nebulae of Universe: Episode 7, The Necklace Nebula"},"content":{"rendered":"

The Necklace Nebula: A Cosmic Jewel in the Arrow<\/p>\n

Dear readers, faithful companions of the lantern and the basketball,<\/p>\n

Before I tell you of a jewel lost in the immensity, allow me to introduce you to my most beautiful stars. You already know my tribe a little, but tonight I want to tell you about them with the pride of a happy man. Jocelyne, my wife, my childhood love, is the most beautiful of constellations. Her gentleness, her strength, her light brighten every one of my days. Jessica, our eldest daughter, dances classical dance with a grace that takes my breath away. She is elegance itself, a living arabesque. Wendy, for her part, is a brown belt in karate. A warrior, a little volcano of determination, who backs down from nothing, and whom I must be careful not to provoke (lol). And then there is Charly, my boy. He has resumed training to prepare for the 2026-2027 season, hoping one day to wear the colours of the HC Bienne \/ Biel next generation. He is studious, very athletic, and he dreams of becoming a professional player. I am very proud of him, just as I am proud of each of my daughters and of the woman who shares my life.<\/p>\n

\"CharlyPrivate foto<\/p>\n

Now that you know my stars, let me show you the one shining fifteen thousand light-years away. There are nights when the sky shows us flowers, bubbles, pillars. And there are nights when it shows us a jewel. Tonight, I want to speak to you of a gem lost in the immensity, a ring of light delicately laid upon the black velvet of the cosmos. A necklace. Not one worn by queens and princesses, but one shaped by a dying star, sculpted by gravity and stellar wind. Tonight, we speak of the Necklace Nebula.<\/p>\n

1. A Jewel in the Constellation of the Arrow<\/p>\n

It hides in the small constellation of Sagitta, the Arrow, not far from Aquila and Cygnus. A modest, discreet constellation, unknown to many gazes, yet it holds this treasure. The Necklace Nebula, catalogued as PN G054.2-03.4, is a planetary nebula, a bubble of gas and dust blown by a star at the end of its life. But unlike most of its sisters, it is neither round nor elliptical. It is an almost perfect ring, a circle of fire and light, dotted with bright knots like pearls. <\/p>\n

\"ConstellationESO.org<\/p>\n

Its distance is estimated at about 15,000 light-years. Its apparent size is tiny: barely a few arcseconds. It takes the sharp eyes of the Hubble Space Telescope, or ground-based instruments equipped with adaptive optics, to reveal its structure. And when you see it, you understand why it bears this romantic name. It is a necklace of cosmic diamonds, suspended in the void.<\/p>\n

2. The Tragic Dance of Two Stars<\/p>\n

But this jewel was born of a drama. At the heart of the Necklace Nebula hides a pair of stars, so close to one another that they orbit each other in just over a day. They are two solar-type stars, or nearly so, sharing an infernal existence. One of them, nearing the end of its life, swelled into a red giant. As it swelled, it engulfed its companion, or at least drew so close that the two stars began to orbit within a common envelope of gas.<\/p>\n

This close dance had a spectacular consequence. The matter of the red giant was ejected into a dense ring, a torus of expanding gas. Within that torus, instabilities condensed into knots, clumps of denser gas that shine more brightly than the rest. It is these knots that trace the pearls of the necklace. Each pearl is a fragment of the dying giant, frozen in space, illuminated by the ultraviolet radiation of the two central stars.<\/p>\n

It is a rare phenomenon. Binary planetary nebulae like this one are laboratories of choice for understanding how stars interact at the end of their lives. They show us that the death of a star is not always solitary. Sometimes, it is danced by two.<\/p>\n

3. The Image That Moved Astronomers<\/p>\n

The first detailed image of the Necklace Nebula was taken by the Hubble Space Telescope in 2011, as part of a survey of binary planetary nebulae. Astronomers were struck by the regularity of the ring and the sharpness of the knots. It is one of those images that remind us that the universe can craft jewels without a jeweller, sculptures without a sculptor.<\/p>\n

Hubble\u2019s images show an almost perfect ring, slightly tilted, with bright knots arranged along its perimeter. The whole is bathed in red and blue light, depending on the filters used. It is a lacework of gas, a fragile treasure, that will dissipate in a few tens of thousands of years.<\/p>\n

4. The Watchman\u2019s Lesson<\/p>\n

Dear readers, the Necklace Nebula teaches us that beauty is sometimes born of the most violent encounters. Two stars, trapped in a deadly embrace, gave rise to one of the most delicate ornaments in the sky. It is a story of love and destruction, of closeness and loss.<\/p>\n

It also reminds us that the universe is a goldsmith. It shapes rings, spirals, pillars, flowers, bubbles. And we, with our telescopes, discover these jewels one by one, like children opening an infinite jewellery box.<\/p>\n

I set down my lantern. It flickers gently, like a pearl of light on an invisible thread. The basketball is in its place. And I think of those two stars, out there in the Arrow, still dancing their suffocating dance, entwined for better and for worse. Their necklace still shines. We are lucky enough to see it.<\/p>\n

5. Observing Guide<\/p>\n

For amateur astronomers equipped with large telescopes, the Necklace Nebula is a challenge. Its apparent magnitude is very faint, around 16, and its small size makes it difficult to distinguish from nearby stars. But with a 400-millimetre instrument, a perfectly dark sky, and an OIII filter, it is possible to glimpse it as a small blurry patch.<\/p>\n

Constellation: Sagitta (the Arrow)<\/p>\n

Right ascension: 19h 43m 59s<\/p>\n

Declination: +17\u00b0 09\u2032 00\u2033<\/p>\n

Apparent magnitude: around 16<\/p>\n

Distance: about 15,000 light-years<\/p>\n

Recommended filter: OIII<\/p>\n

The Necklace Nebula, that jewel so fragile and so distant, still shines for us. The lantern is full, and the sky never ceases to amaze us.<\/p>\n

Fran\u00e7ois<\/p>\n

he Most beautiful Nebulae of UniversesThe Most Beautiful Galaxies:Various StoryA Prayer for Mercy and Justice<\/a>Episode 1: The Crab Nebula<\/a>Episode 1, The Milky Way, Our Island of Light<\/a>Once upon a time: The Birth of a Star<\/a>Black Holes, Sagittarius A*, Multiverses and Time Travel: The Truth Behind the Myth<\/a>Episode 2:\u00a0The Eagle Nebula and The Pillars of Creation<\/a>Episode 2. Andromeda, The Great Sister Coming Toward Us<\/a>The Mirage of Mars<\/a>If the Yankee Weren\u2019t there<\/a>Episode 3 : The Carina Nebula<\/a>\ufeffFrascati neat Roma, Death from the Sky<\/a>The Grand Tour and the Three-Body Problem \u2014 Journey to Neptune<\/a>Episode 4: The Helix Nebula<\/a>\ufeffDefending Earth Against Asteroids and Fascists, When Ignorance Has Its Finger on the Nuclear Button<\/a>History of Astronomy and Obscurantism Ancient and Modern<\/a>Episode 5: The Horsehead Nebula<\/a>\ufeffOnce Upon a Time: The Death of a Star<\/a>The Idiotic Trumpian War on Science<\/a>Episode 6: The Veil Nebula<\/a>\ufeffThe size of The Universe<\/a>Renewable energy, The Sun and Nuclear Fusion<\/a>\ufeff\ufeffLetter to a Climate Skeptic<\/a>Of Stars and Bombs: Why Trump\u2019s Fascism Threatens My Profession, My Employer, and My Country<\/a>\ufeff\ufeffClimate Skeptics: Letter to Obsidia<\/a>The Time of Creation<\/a>\ufeff\ufeffThe Lantern and the Ruler: How we Measured the Universe<\/a>Why the Universe Cannot Be an Accident<\/a>\ufeff\ufeffExoplanet<\/a>The Lantern at the Edge of Infinity, Gravitational Lenses, Dark Energy and the Mystery of Expansion<\/a>\ufeff\ufeffCold: A Symptom of Global Warming<\/a>Blaming Biden? Enough is Enough!<\/a>Whe the Universe opened hits Eyes<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"The Necklace Nebula: A Cosmic Jewel in the Arrow Dear readers, faithful companions of the lantern and the…\n","protected":false},"author":2,"featured_media":827736,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[350613,350614,350615,350616,343512,350617,350618,350619,349972,350620,6626,8149,112454,31079,12596,41631,223700,79,299692,193,124920,15429,8371],"class_list":["post-827735","post","type-post","status-publish","format-standard","has-post-thumbnail","category-space","tag-amateurastronomy","tag-binarystars","tag-cosmicdrama","tag-cosmicjewel","tag-lanternandbasketball","tag-necklacenebula","tag-oiiifilter","tag-sagitta","tag-sciencecommunication","tag-stellarevolution","tag-astronomy","tag-astrophysics","tag-deepspace","tag-hubble","tag-nebula","tag-planetarynebula","tag-recommended","tag-science","tag-scitech","tag-space","tag-spacephotography","tag-stargazing","tag-universe"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/827735","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=827735"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/827735\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/827736"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=827735"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=827735"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=827735"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}