Showing posts from July, 2019

When a Mega-Tsunami Drowned Mars, This Spot May Have Been Ground Zero Source:   By Robin George Andrews, New York Times.   Excerpt: A new study, published last month in the Journal of Geophysical Research: Planets, suggests that a 75-mile-wide impact scar in the Martian northern lowlands is to the red planet what the Chicxulub crater is to Earth: the mark of a meteor that generated a mega-tsunami when the planet was relatively young. If accurate, the finding adds evidence to the hypothesis that Mars once had an ocean, and would have implications for our search for life there....

NASA’s TESS Satellite Spots ‘Missing Link’ Exoplanets See also Newly discovered exoplanet trio could unravel the mysteries of super-Earth formation in Science Magazine . [ ] Source:   By Dennis Overbye, New York Times. Excerpt: NASA’s new planet-hunting spacecraft, the Transiting Exoplanet Survey Satellite, is now halfway through its first tour of the nearby universe. It has been looking for worlds that might be fit for you, me or some other form of life, and as usual, nature has been generous in its rewards. Since its launch in April 2018, TESS has already discovered 21 new planets and 850 more potential worlds that have yet to be confirmed, all residing within a few dozen light years of the sun and our own solar system, according to George Ricker, an M.I.T. researcher who heads the TESS project. So far, he said, TESS “has far exceeded our