Novinky o kometách, meteorech a planetkách

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Komety a meteory na obloze
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Novinky z webů o astronomii
2014-04-15 / www.astrobio.net / An Ancient Impact that Dwarfs K-T
Scientists have identified a 3.26 billion-year-old impact crater that has a diameter up to two and a half times larger than the Chicxulub crater.
2014-04-14 / www.astrobio.net / Beauty from Chaos
Beautiful streamlined islands and narrow gorges were carved by fast-flowing water pounding through a small, plateau region near the southeastern margin of the vast Vallis Marineris canyon system.
2014-04-14 / www.astrobio.net / Continents May Be A Key Feature of Super-Earths
Super-Earths could have active tectonics that expose land masses, and need not be water-worlds.
2014-04-13 / www.astrobio.net / Sunken Logs Create New Worlds for Seafloor Animals
A new paper shows that wood-boring clams serve as ecosystem engineers, making the organic matter in the wood available to other animals that colonize wood falls in the deep waters of Monterey Canyon
2014-04-13 / www.astrobio.net / Testing Life s Origins around Deep Sea Vents
Scientists are exploring the theory that simple metabolic reactions could have led to the origin of life around hot springs on the sea floor.
2014-04-12 / www.astrobio.net / Ancient Volcanic Explosions Shed Light on Mercury s Origins
More detailed data from MESSENGER shows that volcanoes exploded on Mercury for a substantial portion of the planet s history. The findings suggest Mercury not only had volatiles but held on to them fo