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    Astronomy

    As scientists scramble to determine whether there is life on Mars, Ohio University Professor Emeritus William Romoser's research shows that we already have the evidence, courtesy of photographs from various Mars rovers. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    The leftovers from a spectacular supernova that revolutionised our understanding of how stars end their lives have finally been spotted by astronomers at Cardiff University. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    The South Pole-Aitken (SPA) is the largest and deepest basin on the Moon, theoretically opening a window into the lunar lower crust and likely into the upper mantle. However, compositional information of the SPA basin was mainly obtained from orbital remote sensing. Chang'E-4 landed in the SPA Basin, providing a unique chance for in situ probing the composition of the lunar interior. The landing site is located on ejecta strips radiating from Finsen crater, which lies ~135 km to the northeast. The lunar surface at the landing site consists of a very homogenous regolith overlain by few scattered rocks. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    A recent "deep learning" algorithm—despite having no innate knowledge of solar physics—could provide more accurate predictions of how the sun affects our planet than current models based on scientific understanding. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    https://www.nasa.gov/press-release/goddard/2019/sugars-in-meteorites [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    An international team of researchers has found that people in space for long durations can experience blood flowing in the wrong direction in the jugular vein. In their paper published on JAMA Network Open, the group describes their study of blood flow in astronauts. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    Forty years ago, a Voyager spacecraft snapped the first closeup images of Europa, one of Jupiter's 79 moons. These revealed brownish cracks slicing the moon's icy surface, which give Europa the look of a veiny eyeball. Missions to the outer solar system in the decades since have amassed enough additional information about Europa to make it a high-priority target of investigation in NASA's search for life. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    Jupiter is the largest planet in the solar system. In terms of mass, Jupiter dwarfs the other planets. If you were to gather all the other planets together into a single mass, Jupiter would still be 2.5 times more massive. It is hard to understate just how huge Jupiter is. But as we've discovered thousands of exoplanets in recent decades, it raises an interesting question about how Jupiter compares. Put another way, just how large can a planet be? The answer is more subtle than you might think. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    Using the Cooled Mid-Infrared Camera and Spectrometer (COMICS) on the Subaru Telescope, astronomers have detected an unidentified infrared emission band from comet 21P/Giacobini-Zinner (hereafter, comet 21P/G-Z) in addition to the thermal emissions from silicate and carbon grains. These unidentified infrared emissions are likely due to complex organic molecules, both aliphatic and aromatic hydrocarbons, contaminated by N- or O-atoms. Considering the properties of the dust and organic molecules, comet 21P/G-Z might have originated from the circumplanetary disk of a giant planet (like Jupiter or Saturn) where it was warmer than the typical comet-forming regions. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
    Supermassive black holes, weighing millions or even billions of times our Sun's mass, are still only a tiny fraction of the mass of the galaxies they inhabit. But in some cases, the central black hole is the tail wagging the dog. It seems that black holes can run hot or cold when it comes to either enhancing or squelching star birth inside a cluster of galaxies. [...]
    Tue, Nov 19, 2019
    Source: Physorg space news Category: ASTRONOMY
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