Supernovas are often used by astronomers as 'cosmic mile markers' to measure the expansion of the universe Photo: AFP/GETTY IMAGES From The Telegraph:
Nasa astronomers may have finally discovered what initially sparks a cosmic explosion, according to new research.
Scientists used Nasa's Chandra X-Ray laboratory to study supernovas in five nearby elliptical galaxies and the central region of the Andromeda galaxy, a spiral galaxy closest to our own, the Milky Way.
Marat Gilfanov of the Max Planck Institute for Astrophysics in Germany said: "It was a major embarrassment that we did not know how they worked. Now we are beginning to understand what lights the fuse of these explosions."
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