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  2. Cosmic explosion will be visible to the naked eye in once-in ...

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    Astronomers predict that the nova explosion could happen anytime between now and September. The last time this particular star system erupted was in 1946, Schaefer said, and another eruption will ...

  3. Twilight phenomenon - Wikipedia

    en.wikipedia.org/wiki/Twilight_phenomenon

    A twilight phenomenon (seen from the Louisiana-24 Long Range Tracking Telescope site in northern Santa Barbara county) lights up the night sky over Vandenberg Air Force Base following the launch of a Minuteman III missile September 19, 2002 (Official USAF Photo by Dennis Fisher, 30th Communications Squadron) The twilight phenomenon caused by freezing unspent fuel from a Minotaur I launch at ...

  4. Explosive star event will create once-in-a-lifetime sight in ...

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    Astronomers predict that a “new star” will become visible after an explosive event in the Northern Crown constellation, and it could happen anytime. Explosive star event will create once-in-a ...

  5. ‘Once-in-a-lifetime’ explosion will bring a new star to the ...

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    Astronomers are anticipating the appearance of a “new star” triggered by an explosive event that could appear in the night sky anytime between now and September. ‘Once-in-a-lifetime ...

  6. Starfish Prime - Wikipedia

    en.wikipedia.org/wiki/Starfish_Prime

    It was launched from Johnston Atoll on July 9, 1962, and was the largest nuclear test conducted in outer space, and one of five conducted by the US in space. A Thor rocket carrying a W49 thermonuclear warhead (designed at Los Alamos Scientific Laboratory ) and a Mk. 2 reentry vehicle was launched from Johnston Atoll in the Pacific Ocean, about ...

  7. High-altitude nuclear explosion - Wikipedia

    en.wikipedia.org/.../High-altitude_nuclear_explosion

    The visual effects of a high-altitude or space-based explosion may last longer than atmospheric tests, sometimes in excess of 30 minutes. Heat from the Bluegill Triple Prime shot, at an altitude of 50 kilometers (31 miles), was felt by personnel on the ground at Johnston Atoll , and this test caused retina burns to two personnel at ground zero ...

  8. Supernova - Wikipedia

    en.wikipedia.org/wiki/Supernova

    The nature of ultra-stripped supernovae can be both iron core-collapse and electron capture supernovae, depending on the mass of the collapsing core. Ultra-stripped supernovae are believed to be associated with the second supernova explosion in a binary system, producing for example a tight double neutron star system. [135] [136]

  9. Oak Ridge lab, UT scientists seek to better understand how ...

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    Massive star explosions happen about three times per century in our galaxy. Others likely happened on the other side of the galaxy. Oak Ridge lab, UT scientists seek to better understand how ...