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<p>[QUOTE="Ocatarinetabellatchitchix, post: 3997615, member: 99554"]I know many of us are amateur astronomers. You certainly read about something very special happening since mid-November: The giant <b>star</b> Betelgeuse, one of the brightest in the Milky Way, has seen its luminosity fall for a few weeks. It could announce its explosion in a <b>supernova</b>, an extremely rare phenomenon in our galaxy. Located in the constellation Orion, this "red super giant", almost a thousand times larger than the Sun, shines brightly in the winter sky, where it is visible to the naked eye thanks to its orange colour.<img src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Betelgeuse_captured_by_ALMA.jpg/1920px-Betelgeuse_captured_by_ALMA.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /> </p><p>The <b>star</b> was among the 10 brightest in the galaxy, but since mid-November, its brightness has dropped dramatically, by around 70%. Several hypotheses are put forward: it could be an ejection of gas forming dust and hiding the radiation or ... the death of Betelgeuse. The latter scenario would result in a <b>supernova</b> explosion. If it seems unlikely in the near future, it makes astronomers dream: the <b>star</b> at the end of its life having no more "fuel" (from nuclear fusion), its heart would collapse on itself and would form a neutron star, a very compact object which creates a shock wave completely dislocating the <b>star</b>, all in just a few hours. From Earth, we would then observe with the naked eye a point as bright as the Moon in the sky. If we see it explode from here, it will mean that the explosion took place physically 600 years ago... This phenomenon only occurs once a century in the Milky Way, and the last formation of <b>supernova</b> observed dates back to 1604. Hopefully this will happen and that we can attend this unique event. In the meantime, show me your coins featuring <b>supernovas</b> or <b>stars </b>!</p><p><br /></p><p>Julian II</p><p><b>Star</b> within laurel wreath</p><p>[ATTACH=full]1052492[/ATTACH][/QUOTE]</p><p><br /></p>
[QUOTE="Ocatarinetabellatchitchix, post: 3997615, member: 99554"]I know many of us are amateur astronomers. You certainly read about something very special happening since mid-November: The giant [B]star[/B] Betelgeuse, one of the brightest in the Milky Way, has seen its luminosity fall for a few weeks. It could announce its explosion in a [B]supernova[/B], an extremely rare phenomenon in our galaxy. Located in the constellation Orion, this "red super giant", almost a thousand times larger than the Sun, shines brightly in the winter sky, where it is visible to the naked eye thanks to its orange colour.[IMG]https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Betelgeuse_captured_by_ALMA.jpg/1920px-Betelgeuse_captured_by_ALMA.jpg[/IMG] The [B]star[/B] was among the 10 brightest in the galaxy, but since mid-November, its brightness has dropped dramatically, by around 70%. Several hypotheses are put forward: it could be an ejection of gas forming dust and hiding the radiation or ... the death of Betelgeuse. The latter scenario would result in a [B]supernova[/B] explosion. If it seems unlikely in the near future, it makes astronomers dream: the [B]star[/B] at the end of its life having no more "fuel" (from nuclear fusion), its heart would collapse on itself and would form a neutron star, a very compact object which creates a shock wave completely dislocating the [B]star[/B], all in just a few hours. From Earth, we would then observe with the naked eye a point as bright as the Moon in the sky. If we see it explode from here, it will mean that the explosion took place physically 600 years ago... This phenomenon only occurs once a century in the Milky Way, and the last formation of [B]supernova[/B] observed dates back to 1604. Hopefully this will happen and that we can attend this unique event. In the meantime, show me your coins featuring [B]supernovas[/B] or [B]stars [/B]! Julian II [B]Star[/B] within laurel wreath [ATTACH=full]1052492[/ATTACH][/QUOTE]
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