A recent study examines how the Earth was hit by blasts from supernovae (plural form of supernova (SN)) that occurred 3 million years ago (Mya) and 7 Mya with the goal of ascertaining the distances of where these blasts originated. Using the live (not decaying) radioactive isotope 60-Fe, which is produced from supernovae, a team … Continue reading 'Supernovae Struck the Earth 3 Million and 7 Million Years Ago'
X-ray image of the Tycho supernova, also known as SN 1572, located between 8,000 and 9,800 light-years from Earth. Tycho is an example of a recent supernova that was visible from Earth in 1572. ) that occurred 3 million years ago and 7 Mya with the goal of ascertaining the distances of where these blasts originated.
The study’s findings indicate that SN Plio originated between 20 to 140 parsecs , or 65 to 457 light-years , from Earth, but the most likely range is between 50 to 65 pc, or 163 to 212 ly. For SN Mio, the team determined the approximate distance is 110 pc, or 359 ly. For context, 1 pc is equivalent to 3.26 ly.
Dr. Fields notes while the mass extinction that occurred at the end of the Devonian Period approximately 360 million years ago have been the result of one or more supernovae, he tellsthere are currently “no threatening supernova candidates”, as in “none so near that we are in their kill zones.” .located approximately 550 ly from Earth and is the second brightest star in the Orion constellation.
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