The Petersburg Post

Wednesday, Jul 2nd, 2025 - Astronomers have, for the first time, witnessed a star meeting a dramatic end by exploding twice. In a study published in  Nature Astronomy, researchers analyzed the centuries-old remains of supernova SNR 0509-67.5 with the European Southern Observatory's Very Large Telescope, finding the first visual evidence of a star's "double-detonation." Most supernovae are the explosive result of massive stars collapsing ...

Tuesday, Jul 1st, 2025 - For decades, oceanographers assumed the surface waters circling Antarctica were becoming progressively fresher – a shift that helped lock deep heat away and nurture expansive winter sea ice. However, new observations show the opposite is now happening. An international team led by the University of Southampton reported a sudden rise in surface salinity south of 50° latitude. This shift coincided with the ...