Latest Roland Diehl Stories
Just like archaeologists, who rely on radioactive carbon to date the organic remains from past epochs, astronomers have exploited the radioactive decay of an isotope of aluminum to estimate the age of stars in the nearby Scorpius-Centaurus association, the closest group of young and massive stars to the Sun.
ESAâ€™s orbiting gamma-ray observatory, Integral, has made a pioneering unequivocal discovery of radioactive iron-60 in our galaxy that provides powerful insight into the workings of massive stars that pervade and shape it.
Using ESA's Integral observatory, an international team of researchers has been able to confirm the production of radioactive aluminium (Al 26) in massive stars and supernovae throughout our galaxy and determine the rate of supernovae - one of its key parameters.
- In medieval musical notation, a sign or neume denoting a shake or trill.