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    supernova tagged posts

    Astronomers Spot the Same Supernova Three Times—and Predict a Fourth Sighting in 16 years

    September 14, 2021, Categories  Astronomy/Space

    Now you see them, now you don’t. Three views of the same supernova appear in the 2016 image on the left, taken by the Hubble Space Telescope. But they’re gone in the 2019 image. The distant supernova, named Requiem, is embedded in the giant galaxy cluster MACS J0138. The cluster is so massive that its powerful gravity bends and magnifies the light from the supernova, located in a galaxy far behind it. Called gravitational lensing, this phenomenon also splits the supernova’s light into multiple mirror images, highlighted by the white circles in the 2016 image. The multiply imaged supernova disappears in the 2019 image of the same cluster, at right. The snapshot, taken in 2019, helped astronomers confirm the object’s pedigree. Supernovae explode and fade away over time...
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    Exploding Stars may have caused Mass Extinction on Earth, study shows

    August 20, 2020, Categories  Astronomy/Space

    A team of researchers led by professor Brian Fields hypothesizes that a supernova about 65 light-years away may have contributed to the ozone depletion and subsequent mass extinction of the late Devonian Period, 359 million years ago. Pictured is a simulation of a nearby supernova colliding with and compressing the solar wind. Earth’s orbit, the blue dashed circle, and the Sun, red dot, are shown for scale.
    Graphic courtesy Jesse Miller

    Imagine reading by the light of an exploded star, brighter than a full moon – it might be fun to think about, but this scene is the prelude to a disaster when the radiation devastates life as we know it...

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    NASA missions help reveal the power of Shock waves in a Nova Explosion

    April 14, 2020, Categories  Astronomy/Space

    V906 Carinae (circled) shines near peak brightness in this image taken on March 23, 2018, three days after the nova was discovered. The beautiful cloud of gas and dust dominating the picture is part of the Carina Nebula.
    Credits: Copyright 2018 by A. Maury and J. Fabrega, used with permission

    Unprecedented observations of a nova outburst in 2018 by a trio of satellites, including two NASA missions, have captured the first direct evidence that most of the explosion’s visible light arose from shock waves — abrupt changes of pressure and temperature formed in the explosion debris.

    A nova is a sudden, short-lived brightening of an otherwise inconspicuous star...

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    Scientists discover Supernova that Outshines all others

    April 13, 2020, Categories  Astronomy/Space

    Artist’s impression of a supernova. Credit: Aaron Geller (Northwestern University)

    A supernova at least twice as bright and energetic, and likely much more massive than any yet recorded has been identified by an international team of astronomers, led by the University of Birmingham.

    The team, which included experts from Harvard, Northwestern University and Ohio University, believe the supernova, dubbed SN2016aps, could be an example of an extremely rare ‘pulsational pair-instability’ supernova, possibly formed from two massive stars that merged before the explosion. Their findings are published today in Nature Astronomy.

    Such an event so far only exists in theory and has never been confirmed through astronomical observations.

    Dr...

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