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Showing results 61-67 of 67 for 'Space'

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    What the Neutron Star Collision Means for Dark Matter

    In October, LIGO and its European counterpart, VIRGO, witnessed gravitational waves rippling out from a breathtaking collision between two neutron stars. This unprecedented event looked like yet another triumph for a new kind of astronomy, one that could use gravitational waves to probe some of the universe’s deepest mysteries. But in all the excitement, most people didn’t notice that something had died: a whole group of theories that posit a universe with no dark matter.

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    Neptune’s Other Moons Were Normal Until Triton Crashed the Party

    <em>New Scientist</em> reports on the mess Triton, the largest of Neptune’s many moons, made when it joined that planet’s lunar group. A Weizmann scientist and her Colorado colleague “used a series of computer simulations to figure out what the Neptune system was like before Triton barrelled in.”

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    Colder and Colder

    When investigating atoms, scientists face a challenge – at room temperature, individual atoms in a gas have kinetic energy and spin about at high velocities. Temperature is, in essence, the measurement of the relative movement between atoms; thus the goal of getting the atoms to have small relative velocities involves freezing them to extremely cold temperatures.

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    Unveiling the Depths of Jupiter’s Winds

    Three papers appearing in Nature on March 8 answer a question that scientists have been asking ever since Galileo first observed the famous stripes of Jupiter: Are the colorful bands just a pretty surface phenomenon, or are they a significant stratum of the planet? The Weizmann Institute of Science’s Prof. Yohai Kaspi led this research, in which measurements from NASA’s Juno spacecraft were analyzed to reveal that the stripes – belts of strong winds circling the planet – extend to a depth of about 3,000 km (about 1,900 miles). That is quite a bit deeper than previous estimates, and is revising scientists’ picture of Jupiter’s atmosphere as well as its inner layers.

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