20 March 2023
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  • [ 23 February 2023 ] Webb images M92, one of the Milky Way’s oldest globular clusters News
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iron isotope

News

Radioactive ‘timers’ reveal likely source of galactic cosmic rays

22 April 2016 Astronomy Now

Most of the cosmic rays arriving at Earth from our galaxy come from nearby clusters of massive stars, according to new observations from NASA’s Advanced Composition Explorer (ACE) spacecraft. But the detection of a few radioactive cosmic-ray iron nuclei also indicates that there has been a supernova in our galactic neighbourhood within the last few million years.

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News Headlines

  • Webb images M92, one of the Milky Way’s oldest globular clusters
    23 February 2023
  • The Eskimo: observe one of winter’s best planetary nebulae
    20 February 2023
  • See all the planets in January
    16 January 2023
  • Frank Drake, SETI pioneer, 1930–2022
    3 September 2022
  • Webb images of Jupiter show auroras, rings, moons
    24 August 2022
  • Home
  • The Magazine
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      • March last issue
      • April last issue
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  • AstroFest 2023
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    • Almanac
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    • DSLR Calc
  • Reviews
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    • Book Reviews
  • Spaceflight Now
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  • Contact Us
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