Skywatch

  • March 22, 2007

    Episode 90: Got Supernovae?

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    Shownotes

    The universe is full of calcium ? the same substance that helps clot blood and fortifies bones. Calcium, in fact, is the fifth most common element on our planet. We know that elements like iron and sulfur come from the nuclear reactions in exploding stars. It turns out that these supernovae explosions also produce calcium. New X-ray observations taken at the XMM-Newton Observatory indicate that the universe has more calcium than previously thought, giving rise to new theories about the formation of elements and the role of supernovae in their creation.