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    • Earliest and most distant galaxy ever observed

      Earliest and most distant galaxy ever observed

      BBC via Yahoo News· 6 hours ago

      The telescope's previous record holder was a galaxy seen at 325 million years after the Big Bang. Astronomers say the most interesting aspect of the...

    • When Was Earth Last Struck by a Supernova?

      When Was Earth Last Struck by a Supernova?

      Scientific American· 7 days ago

      In this case, a supernova within about 160 light-years, or 1.5 quadrillion kilometers, would qualify. Iron 60 is a radioactive isotope of iron that...