Kavli Institute for Cosmology, Cambridge 27 Apr 2017, 08:53 UTC A young star recently observed to be surrounded by spiralling gas and dust could be one of the first to show planet formation ‘in action’ via a mechanism once thought to be unlikely. Astrophysicists at the University of Cambridge have used theoretical models to determine the origins of the striking large-scale spiral features surrounding a nearby star.
NASA's Jet Propulsion Laboratory News and Features 26 Apr 2017, 20:22 UTC
NASA's Jet Propulsion Laboratory News and Features 26 Apr 2017, 16:11 UTC
NASA's Goddard Space Flight Center 26 Apr 2017, 12:27 UTC
NASA's Jet Propulsion Laboratory News and Features 24 Apr 2017, 18:16 UTC
NASA's Goddard Space Flight Center 24 Apr 2017, 15:00 UTC
CERN 24 Apr 2017, 15:00 UTC In a paper published today in Nature Physics (link is external), the ALICE collaboration reports that proton collisions sometimes present similar patterns to those observed in the collisions of heavy nuclei. This behaviour was spotted through observation of so-called strange hadrons in certain proton collisions in which a large number of particles are created. Strange hadrons are well-known particles with names such as Kaon, Lambda, Xi and Omega, all containing at least one so-called strange quark. The observed ‘enhanced production of strange particles’ is a familiar feature of quark-gluon plasma, a very hot and dense state of matter that existed just a few millionths of a second after the Big Bang, and is commonly created in collisions of heavy nuclei. But it is the first time ever that such a phenomenon is unambiguously observed in the rare proton collisions in which many particles are created. This result is likely to challenge existing theoretical models that do not predict an increase of strange particles in these events.