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    supernovae tagged posts

    Alien Radioactive Element Prompts Creation Rethink

    May 20, 2021, Categories  Astronomy/Space

    This false-colour composite from NASA Spitzer Space Telescope and NASA Chandra X-ray Observatory shows the remnant of N132D. Credit: NASA/JPL-Caltech/Harvard-Smithsonian CfA. 

    The first-ever discovery of an extraterrestrial radioactive isotope on Earth has scientists rethinking the origins of the elements on our planet.

    The tiny traces of plutonium-244 were found in ocean crust alongside radioactive iron-60. The two isotopes are evidence of violent cosmic events in the vicinity of Earth millions of years ago.

    Star explosions, or supernovae create many of the heavy elements in the periodic table, including those vital for human life, such as iron, potassium and iodine.

    To form even heavier elements, such as gold, uranium and plutonium it was thought that a more violent event ma...

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    Supernova surprise creates Elemental Mystery

    December 4, 2020, Categories  Astronomy/Space

    In the triple-alpha process, stars fuse three helium nuclei, also called alpha particles together (left) to create a single carbon atom with a surplus of energy, known as a Hoyle state. That Hoyle state can split back into three alpha particles or relax to the ground state of stable carbon by releasing a couple gamma rays (center). Inside supernovae, however, the creation of stable carbon can be enhanced with the help of extra protons (right). Credit: Facility for Rare Isotope Beams

    Michigan State University (MSU) researchers have discovered that one of the most important reactions in the universe can get a huge and unexpected boost inside exploding star – supernovae.

    This finding also challenges ideas behind how some of the Earth’s heavy elements are made...

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    New Cosmic Magnetic Field structures discovered in Galaxy NGC 4217

    July 23, 2020, Categories  Astronomy/Space

    The spiral galaxy NGC 4217 has a huge magnetic field that is shown here as green lines. The data for this visualisation were recorded with the radio telescope Karl G. Jansky Very Large Array (VLA) of the National Science Foundation. The image of the galaxy shown from the side is taken from data from the Sloan Digital Sky Survey and Kitt Peak National Observatory.

    Superbubbles, giant loops and X-shaped magnetic field structures – this galaxy boasts a veritable wealth of shapes. Spiral galaxies such as our Milky Way can have sprawling magnetic fields. There are various theories about their formation, but so far the process is not well understood...

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    Physicists model the Supernovae that result from Pulsating Supergiants like Betelgeuse

    March 3, 2020, Categories  Astronomy/Space

    Unlike most stars, Betelgeuse is large enough and close enough for scientists to resolve with instruments like the ALMA telescope. Credit: ALMA (ESO/NAOJ/NRAO)

    Betelgeuse has been the center of significant media attention lately. The red supergiant is nearing the end of its life, and when a star over 10 times the mass of the Sun dies, it goes out in spectacular fashion. With its brightness recently dipping to the lowest point in the last hundred years, many space enthusiasts are excited that Betelgeuse may soon go supernova, exploding in a dazzling display that could be visible even in daylight.

    While the famous star in Orion’s shoulder will likely meet its demise within the next million years—practically couple days in cosmic time—scientists maintain that its dimming is due to th...

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