Physics

We now have more evidence that Galileo likely never said “And yet it moves”

Enlarge / Portrait of Galileo Galilei by Justus Sustermans, circa 1640. Galileo Galilei famously stood trial for suspicion of heresy for his insistence—based on astronomical observations through his telescopes—that the Copernican model of the Solar System was correct. The Earth revolved around the Sun, not the other way around, contrary to the Catholic Church’s teachings …

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Astronomers have discovered closest black hole yet in trinary star system

Enlarge / Artist’s impression showing orbits of the objects in the HR 6819 triple system. There is an inner binary with one star (orbit in blue) and a newly discovered black hole (orbit in red), as well as a third star in a wider orbit (also in blue). ESO/L. Calçada Astronomers with the European Southern …

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Physicists identify unique signature to confirm quark-gluon plasma in universe

Computer simulation of a merger between two dense neutron stars. After the merger, a phase transition from ordinary hadronic matter (red-yellow) to quark matter (green) takes place. In the first fractions of a second of our universe’s existence, the energy density was so incredibly high that there were no protons and neutrons, just a hot …

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