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  • Astronomers Disprove Long-Held Belief About Galaxy Density

    08/20/2024 6:07:06 AM PDT · by Salman · 15 replies
    Space Daily ^ | Aug 20, 2024 | Simon Mansfield
    An international team of astronomers has overturned a longstanding belief that stars and dark matter interact in a mysterious way to create uniform density structures across different galaxies. This finding, published in 'Monthly Notices of the Royal Astronomical Society (MNRAS)', challenges a theory that had perplexed scientists for 25 years. The research team, which includes scientists from Australia, the UK, Austria, and Germany, utilized the Very Large Telescope in Chile to observe and analyze 22 galaxies that are approximately four billion years old. The results revealed that the perceived uniformity in galaxy density may not be a real phenomenon but...
  • Giant Meteorites Slammed Earth Around A.D. 500?

    02/05/2010 7:31:57 AM PST · by Palter · 31 replies · 906+ views
    National Geographic News ^ | 03 Feb 2010 | Richard A. Lovett
    Double impact may have caused tsunami, global cooling Pieces of a giant asteroid or comet that broke apart over Earth may have crashed off Australia about 1,500 years ago, says a scientist who has found evidence of the possible impact craters. Satellite measurements of the Gulf of Carpentaria (see map) revealed tiny changes in sea level that are signs of impact craters on the seabed below, according to new research by marine geophysicist Dallas Abbott. Based on the satellite data, one crater should be about 11 miles (18 kilometers) wide, while the other should be 7.4 miles (12 kilometers) wide....