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ScienceDaily: Space & Time News |
| 4 billion-year-old relic from early solar system heading our way Posted: 12 Apr 2022 11:10 AM PDT An enormous comet -- approximately 80 miles across, more than twice the width of Rhode Island -- is heading our way at 22,000 miles per hour from the edge of the solar system. Fortunately, it will never get closer than 1 billion miles from the sun, and poses no danger to us. |
| Breakthrough measurement elucidates neutrino interactions Posted: 12 Apr 2022 11:10 AM PDT Physicists studying ghost-like particles called neutrinos from the international MicroBooNE collaboration have reported a first-of-its-kind measurement: a comprehensive set of the energy-dependent neutrino-argon interaction cross sections. This measurement marks an important step towards achieving the scientific goals of next-generation of neutrino experiments--namely, the Deep Underground Neutrino Experiment (DUNE). |
| Simulating supernova remnants, star formation in earthbound lab Posted: 12 Apr 2022 11:10 AM PDT When triggered by some external agent, shockwaves can propagate through molecular clouds of gas and dust to create pockets of dense material. At a certain limit, that dense gas and dust collapses and begins to form new stars. Researchers modeled this interaction using a high-power laser and a foam ball. The foam ball represents a dense area within a molecular cloud. The high-power laser creates a blast wave that propagates through a surrounding chamber of gas and into the ball, where the team observed the compression using X-ray images. |
| Modeling Earth's magnetosphere in the laboratory Posted: 12 Apr 2022 11:10 AM PDT Scientists report a method to study smaller magnetospheres, sometimes just millimeters thick, in the laboratory. The new experimental platform combines the magnetic field of the Large Plasma Device with a fast laser-driven plasma and a current-driven dipole magnet. The LAPD magnetic field provides a model of the solar system's interplanetary magnetic field, while the laser-driven plasma models the solar wind and the dipole magnet provides a model for the Earth's inherent magnetic field. Motorized probes allow system scans in three dimensions by combining data from tens of thousands of laser shots. |
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