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Jupiter and space rocks

11 December 2016

At http://phys.org/print400491395.html … clues about the timing of Jupiter's formation. New research suggests the presence of Jupiter near the asteroid belt may account for a peculiar class of meteorites that offer scientists clues on how the planet Jupiter took shape and wandered through the solar system. Of course all this happened a very long time ago – and Jupiter may have migrated from an orbit much closer to the Sun. See also www.dailymail.co.uk/sciencetech/article-4019168/Mysterious-meteorite-rev…

At http://phys.org/print400498310.html … Siberia and meteors. Meteors are pieces of comet and asteroid debris that strike Earth's atmosphere – and the likes of Chelyabinsk, Tunguska, and another big one in 1947, 70 tons of iron in various lumps fell on the Sikhte-Alin mountains in Siberia.

At www.skyandtelescope.com/astronomy-news/space-rocks-hit-moon-often-131020… … and www.scientificamerican.com/article/incoming-space-rocks-strike-the-moon-… … images from NASAs Lunar Reconnaissance Orbiter shows that space rocks strike the moon frequently. It is calculated that roughly 180 craters at least 10m wide or larger form on the moon every year. This is about the same rate as meteorites entering the atmosphere of the earth each year – most of which don't reach the surface.

At www.scientificamerican.com/article/strange-comet-discoveries-revealed-by… … where we are told the comet has sand dunes – very similar to sand dunes on the earth (and various other geological features have resemblances). At www.scientificamerican.com/video/flavor-of-the-ray-snagging-the-mysterio… … a video by Nature journal that claims to have detected neutrinos in the centre of the Sun and followed their journey through the solar system.


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