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Keyword: supernova

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  • Astronomers find first strong evidence of neutron star remnant of exploding star

    02/22/2024 11:37:18 AM PST · by Red Badger · 6 replies
    Phys Org ^ | FEBRUARY 22, 2024 | by University College London
    Combination of a Hubble Space Telescope image of SN 1987A and the compact argon source. The faint blue source in the centre is the emission from the compact source detected with the JWST/NIRSpec instrument. Outside this is the stellar debris, containing most of the mass, expanding at thousands of km/second. The inner bright "string of pearls" is the gas from the outer layers of the star that was expelled about 20,000 years before the final explosion. The is the fast debris are now colliding with the ring, explaining the bright spots. Outside of the inner ring are two outer rings,...
  • Natural Plutonium Discovered Beneath The Oceans Shows Cataclysmic History

    05/28/2021 8:37:10 AM PDT · by SunkenCiv · 51 replies
    YouTube ^ | May 27, 2021 | Scott Manley (fly safe)
    Plutonium is generally thought of as an artificial element created by humans, primarily to make the pits of nuclear weapons, but naturally occurring plutonium can be found in ancient rocks. Plutonium 244 is the longest lived isotope of Plutonium, but it's not easy to make, and finding this specific isotope in interstellar dust grains laid down on the ocean floors tells us important things about the formation of the elements that make up the Earth.Based on this paper:60Fe and 244Pu deposited on Earth constrain the r-process yields of recent nearby supernovae A. Wallner et al
  • NASA’s Webb Stuns With New High-Definition Look at Exploded Star

    12/12/2023 1:06:36 PM PST · by Red Badger · 19 replies
    NASA ^ | NASA Webb Telescope Team
    Mysterious features hide in near-infrared light Like a shiny, round ornament ready to be placed in the perfect spot on a holiday tree, supernova remnant Cassiopeia A (Cas A) gleams in a new image from NASA’s James Webb Space Telescope. As part of the 2023 Holidays at the White House, First Lady of the United States Dr. Jill Biden debuted the first-ever White House Advent Calendar. To showcase the “Magic, Wonder, and Joy” of the holiday season, Dr. Biden and NASA are celebrating with this new image from Webb. While all is bright, this scene is no proverbial silent night....
  • Israeli tech billionaire whose daughter was murdered by Hamas believes in ‘peace’ — only after terrorists are ‘eliminated’

    12/12/2023 7:45:51 AM PST · by BenLurkin · 19 replies
    Danielle Waldman and her boyfriend of six years, Noam Shai, were murdered by the terrorists while they and three friends were attempting to drive away from the music festival bloodbath. A brief video showed Shai driving away in a Jeep as his girlfriend sits in the back next to a man who says, Waldmanher in the back seat of a Jeep with a friend who tried to reassure them: “We will be alright. Everything is okay, right?” Her dad – who founded the chip maker Mellanox Technologies and sold the company to Nvidia for $6.8 billion in 2019 – had...
  • In 2009, a Massive Star Vanished. JWST Might Have Figured Out What Happened.

    10/05/2023 11:56:59 AM PDT · by Red Badger · 18 replies
    Science Alert ^ | 05 October 2023 | By BRIAN KOBERLEIN, UNIVERSE TODAY
    Illustration of how a failed supernova can become a black hole. (P. Jeffries/STScI/NASA/ESA) In 2009 a giant star 25 times more massive than the Sun simply…vanished. Okay, it wasn't quite that simple. It underwent a period of brightening, increasing in luminosity to a million Suns, just as if it was ready to explode into a supernova. But then it faded rather than exploding. And when astronomers tried to see the star, using the Large Binocular Telescope (LBT), Hubble, and the Spitzer space telescope, they couldn't see anything. The star, known as N6946-BH1, is now considered a failed supernova. The BH1...
  • Cosmic Gold Factory: Single Kilonova Produced 1,000x the Mass of the Earth in Very Heavy Elements

    08/09/2023 1:06:39 PM PDT · by Red Badger · 11 replies
    Scitech Daily ^ | AUGUST 8, 2023 | By UNIVERSITY OF BIRMINGHAM
    Artist’s impression of GRB 211211A. Scientists have linked this unusual gamma-ray burst from a nearby galaxy to a neutron star merger. Credit: Soheb Mandhai @TheAstroPhoenix An unusually powerful gamma-ray burst (GRB 211211A), detected from a nearby galaxy, has been linked to a neutron star merger by an international team of scientists. This burst, notable for its excess of infrared light, was shown to originate from a kilonova, an event thought to occur when neutron stars collide. Scientists have linked a highly unusual blast of high-energy light from a nearby galaxy to a neutron star merger. The event, detected in December...
  • New supernova thrills astronomers and skywatchers around the world

    05/25/2023 11:55:32 AM PDT · by Red Badger · 24 replies
    www.space.com ^ | MAY 25, 2023 | By Elizabeth Howell
    The Pinwheel Galaxy has a new bright spot. ... an animation showing a bright star explosion appearing in a spiral galaxy Long Island, New York-based astrophotographer Steven Bellavia produced this composite animation of the Pinwheel Galaxy using an image taken on April 21 and comparing it to another image taken on May 21, which clearly shows the supernova appearing. (Image credit: Steven Bellavia) Astronomers and amateurs alike are excited about a new star explosion visible in small telescopes. The new supernova popped into visibility on May 19 in the Pinwheel Galaxy, (also designated as Messier 101, or M101). The galaxy...
  • Radio Signals From a Dying Star Raise Questions About Supernova Explosions

    05/18/2023 8:11:00 AM PDT · by Red Badger · 16 replies
    Science Alert ^ | 18 May 2023 | By STUART RYDER & ERIK KOOL, THE CONVERSATION
    Illustration of a supernova remnant, ejecting a white dwarf at high speed. (Mark Garlick/Science Photo Library/Getty Images) When stars like our Sun die, they tend to go out with a whimper and not a bang – unless they happen to be part of a binary (two) star system that could give rise to a supernova explosion. Now, for the first time, astronomers have spotted the radio signature of just such an event in a galaxy more than 400 million light-years away. The finding, published today in Nature, holds tantalizing clues as to what the companion star must have been like....
  • Cosmic Kaboom: Astronomers Reveal the Largest Explosion Ever Witnessed

    05/12/2023 6:47:04 AM PDT · by Red Badger · 27 replies
    Scitech Daily ^ | MAY 12, 2023 | By UNIVERSITY OF SOUTHAMPTON
    Artist impression of a black hole accretion. Astronomers led by the University of Southampton have discovered the largest cosmic explosion ever observed, known as AT2021lwx. Over ten times brighter than any known supernova and three times brighter than the brightest tidal disruption event, the explosion has been ongoing for more than three years. Researchers believe the explosion is due to a massive gas cloud, possibly thousands of times larger than the sun, being violently disrupted by a supermassive black hole. Credit John A. Paice www.johnapaice.com Astronomers have discovered the largest cosmic explosion ever observed, AT2021lwx, which is believed to have...
  • JWST Catches Sight of a Rare Star on The Brink of Going Supernova

    03/16/2023 9:04:32 AM PDT · by Red Badger · 16 replies
    Science Alert ^ | 16 March 2023 | By MICHELLE STARR
    JWST's new image of WR 124 and its nebula. (NASA, ESA, CSA, STScI, Webb ERO Production Team) There's scintillating beauty to be found in cosmic death. In a new image from the JWST, the spectacular final throes of a star nearing the end of its life are revealed in all their intricate detail. Located in the constellation Sagittarius, the star WR 124 is what's known as a Wolf-Rayet, which are rarely seen in the Milky Way. That's because only certain stars turn into Wolf-Rayets, and even then their time in that phase is so short; in just a few hundred...
  • NASA finds new information from star that exploded more than 450 years ago

    03/01/2023 6:01:34 AM PST · by Red Badger · 18 replies
    UPI ^ | FEB. 28, 2023 / 1:00 PM | By Matt Bernardini
    NASA obtained new information from the exploded Tycho Supernova, which was first seen from Earth in 1752. Photo courtesy of NASA Feb. 28 (UPI) -- A group of scientists has uncovered new information from a star that exploded more than 450 years ago, propelling particles to near the speed of light. Astronomers used NASA's Imaging X-ray Polarimetry Explorer to study the remains of a supernova called Tycho. They were able to discover how Tycho accelerates particles closer to the speed of light than any particle accelerator on Earth. "As one of the so-called historical supernovae, Tycho was observed by humanity...
  • Astronomy Picture of the Day - RCW 86: Historical Supernova Remnant

    03/03/2023 11:58:10 AM PST · by MtnClimber · 6 replies
    APOD.NASA.gov ^ | 3 Mar, 2023 | Image Credit: CTIO/NOIRLab/DOE/NSF/AURA, T.A. Rector (Univ.of Alaska/NSF’s NOIRLab), J. Miller (Gemi
    Explanation: In 185 AD, Chinese astronomers recorded the appearance of a new star in the Nanmen asterism. That part of the sky is identified with Alpha and Beta Centauri on modern star charts. The new star was visible to the naked-eye for months, and is now thought to be the earliest recorded supernova. This deep telescopic view reveals the wispy outlines of emission nebula RCW 86, just visible against the starry background, understood to be the remnant of that stellar explosion. Captured by the wide-field Dark Energy Camera operating at Cerro Tololo Inter-American Observatory in Chile, the image traces the...
  • Astronomer Have Discovered A Mysterious Object, Which Is 570 Billion Times Brighter Than The Sun

    02/06/2023 5:12:32 PM PST · by entropy12 · 75 replies
    /blog.physics-astronomy ^ | Unknown | Umer Abrar
    Billions of light years away, there is a giant ball of hot gas that is brighter than hundreds of billions of suns. It is hard to imagine something so bright. So what is it? Astronomers are not really sure, but they have a couple theories. They think it may be a very rare type of supernova — called a magnetar — but one so powerful that it pushes the energy limits of physics, or in other words, the most powerful supernova ever seen as of today. This object is so luminous that astronomers are having a really difficult time finding...
  • Astronomy Picture of the Day - Where Your Elements Came From

    01/08/2023 5:50:22 PM PST · by MtnClimber · 24 replies
    APOD.NASA.gov ^ | 8 Jan, 2023 | Image Credit & License: Wikipedia: Cmglee; Data: Jennifer Johnson (OSU)
    Explanation: The hydrogen in your body, present in every molecule of water, came from the Big Bang. There are no other appreciable sources of hydrogen in the universe. The carbon in your body was made by nuclear fusion in the interior of stars, as was the oxygen. Much of the iron in your body was made during supernovas of stars that occurred long ago and far away. The gold in your jewelry was likely made from neutron stars during collisions that may have been visible as short-duration gamma-ray bursts or gravitational wave events. Elements like phosphorus and copper are present...
  • What Happens If A Star Explodes Near The Earth? | |

    11/24/2022 2:29:38 PM PST · by SunkenCiv · 87 replies
    YouTube ^ | November 15, 2022 | Veritasium (Derek Alexander Muller)
    What Happens If A Star Explodes Near The Earth?Veritasium | November 15, 2022
  • IXPE (Imaging X-ray Polarimetry Explorer) Measures Exploded Star Remains

    10/21/2022 11:07:14 AM PDT · by Red Badger · 7 replies
    NASA ^ | Oct 21, 2022 | Staff
    When a massive star collapsed in the Cassiopeia constellation, it generated a supernova explosion with some of the fastest shockwaves in the Milky Way. These speedy shock waves are one of the reasons the Cassiopeia A (Cas A) supernova remnant was chosen to be our Imaging X-ray Polarimetry Explorer’s (IXPE) first observed object. This composite image, made of data from IXPE, the Chandra Observatory, and the Hubble Telescope, shows Cas A. IXPE’s investigation of Cas A from Jan. 11 to Jan. 29, 2022, added crucial information about the behavior of exploded stars’ magnetic fields: scientists found that the magnetic fields...
  • Scientists Just Detected a Colossal Gamma-Ray Burst, And It's a Record-Breaker

    10/12/2022 7:35:55 AM PDT · by BenLurkin · 21 replies
    .sciencealert.com ^ | 12 October 2022 By | MICHELLE STARR
    Initially dubbed Swift J1913.1+1946...now re-named GRB221009A. 2.4 billion light-years away...18 teraelectronvolts. [T]hough this proximity happens to be 20 times closer than the average long gamma-ray burst, it poses absolutely no danger to life on Earth. Rather, it's tremendously exciting – an event that could These bursts mark the end of the life of a massive star – a supernova or hypernova. They can also emerge from a collision between two neutron stars. Different gamma-ray burst profiles mean different kinds of explosions, which fade in different ways. When astronomers observed a collision between two neutron stars in 2017, it produced a...
  • Setting the Clock on a Stellar Explosion

    09/15/2022 9:03:12 AM PDT · by Red Badger · 32 replies
    NASA ^ | Last Updated: Sep 14, 2022 | Editor: Lee Mohon
    snr0519 While astronomers have seen the debris from scores of exploded stars in the Milky Way and nearby galaxies, it is often difficult to determine the timeline of the star’s demise. By studying the spectacular remains of a supernova in a neighboring galaxy using NASA telescopes, a team of astronomers has found enough clues to help wind back the clock. The supernova remnant called SNR 0519-69.0 (SNR 0519 for short) is the debris from an explosion of a white dwarf star. After reaching a critical mass, either by pulling matter from a companion star or merging with another white...
  • NASA’s Fermi Confirms Star Wreck as Source of Extreme Cosmic Particles

    08/11/2022 1:00:24 PM PDT · by Red Badger · 10 replies
    NASA ^ | Staff
    Astronomers have long sought the launch sites for some of the highest-energy protons in our galaxy. Now a study using 12 years of data from NASA’s Fermi Gamma-ray Space Telescope confirms that one supernova remnant is just such a place. Explore how astronomers located a supernova remnant that fires up protons to energies 10 times greater than the most powerful particle accelerator on Earth. VIDEO AT LINK................... Credits: NASA’s Goddard Space Flight Center Fermi has shown that the shock waves of exploded stars boost particles to speeds comparable to that of light. Called cosmic rays, these particles mostly take the...
  • Stunning Image of Supernova Remnant Processed by New Australian Supercomputer

    08/10/2022 8:34:48 AM PDT · by Red Badger · 26 replies
    Science Alert ^ | Aug 10, 2022 | WASIM RAJA & PASCAL JAHAN ELAHI
    The galactic supernova remnant G261.9+5.5. (Wasim Raja/CSIRO; Pascal Elah/Pawsey) Within 24 hours of accessing the first stage of Australia's newest supercomputing system, researchers have processed a series of radio telescope observations, including a highly detailed image of a supernova remnant. The very high data rates and the enormous data volumes from new-generation radio telescopes such as ASKAP (Australian Square Kilometre Array Pathfinder) need highly capable software running on supercomputers. This is where the Pawsey Supercomputing Research Centre comes into play, with a newly launched supercomputer called Setonix – named after Western Australia's favorite animal, the quokka (Setonix brachyurus). ASKAP, which...