Our Solar System Confirmation of Supernova Explosion in the Neighborhood

Approximately 2 million years ago a star explode in a supernova close to our solar system: Its traces can still be establish today in the form of an iron isotope found on the ocean floor. Currently scientists at the Technical University of Munich (TUM), together with generation from the USA, have found increased concentration of this supernova-iron in lunar samples as well. They consider both discoveries to originate from the similar stellar explosion.
A dying star ends its life in a cataclysmic bang, shooting the majority of the star's material, primarily latest chemical elements created through the explosion, out into space.
One or extra such supernovae appear to have occur close to our solar system about two million years ago. Evidence of the fact has been establish on the earth in the form of increased concentration of the iron isotope 60Fe detect in Pacific ocean deep-sea crusts and in ocean-floor sediment sample.
 This evidence is highly forceful: The radioactive 60Fe isotope is created almost wholly in supernova explosion. And with a half-life of 2.62 million years, relatively short compare to the age of our solar system, any radioactive 60Fe originate from the time of the solar system's birth should have long ago decayed into stable rudiments and thus should no longer be establish on the earth.
This supernova hypothesis was opening put forth in 1999 by researchers at the Technical University of Munich (TUM) who had establish initial evidence in a deep-sea coating. Now their claim has conventional further corroboration: Physicists at the TUM and their generation from the USA have succeed in demonstrating an unusually high concentration of 60Fe in lunar earth samples as well.
The sample were gathered between 1969 and 1972 throughout Apollo lunar missions 12, 15 and 16, which brought the lunar material back to- earth.
It's also imaginable that 60Fe can occur on the moon as the effect of bombardment with cosmic particles, since these particle do not break up when collide with air molecules, as is the case with the earth's atmosphere. in its place they directly impact the lunar surface and can thus effect in change of elements. "But this can only account for a very small piece of the 60Fe found," explain Dr. Gunther Korschinek, physicist at TUM and scientist of the Cluster of fineness Structure and Origin of the space.
We therefore assume that the 60Fe establish in both earthly and lunar samples has the same source: These deposits are recently created stellar matter, produced in one or more supernovae, says Dr. Korschinek.
Since the moon usually provides a better cosmic proof than the earth, the scientists were also able to specify for the opening time an upper limit for the flow of 60Fe that must have reach the moon. Among other things this also makes it likely for the researchers to infer the coldness to the supernova event: "The measured 60Fe-flow correspond to a supernova at a distance of about 300 light years," says Korschinek. "This worth is in high-quality agreement with a lately theoretical estimation published in 'nature'."
 Our Solar System  Confirmation of Supernova Explosion in the Neighborhood
The lunar sample were investigate with the high-sensitivity accelerator mass spectrometer of the Maier-Leibnitz Laboratory near Munich. In adding to the TUM's physicists, US scientists from Rutgers University and the Planetary Science organization in Los Alamos were also involved in the publication. Financial support for the study was provided by the German study Foundation (Deutsche Forschungsgemeinschaft, DFG) via the fineness Cluster Universe.

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