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Week 43


Comet of the Week: Siding Spring C/2013 A1

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Special Topic: 1I/‘Oumuamua

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OCTOBER 18, 1977: Charles Kowal discovers the first-known centaur, (2060) Chiron, with the 1.2-meter Schmidt telescope at Palomar Observatory in California. Centaurs are the subject of a previous “Special Topics” presentation.  OCTOBER 18, 1989: NASA’s Galileo mission is deployed from the Space Shuttle Atlantis, with its final destination being Jupiter. While en route to Jupiter …

Perihelion: 2014 October 25.30, q = 1.399 AU  Of the various comprehensive survey programs that have been operational since the first such programs commenced in the late 1990s, only one has been based in the southern hemisphere: the Siding Spring Survey, based at its namesake observatory in New South Wales and which operated with funding …

While the details are always in a state of revision, for quite some time now the general consensus among astronomers as to how the solar system and its planets formed involves the accumulation of smaller objects, “planetesimals.” The comets and asteroids we see today, and that have been the primary focus of “Ice and Stone …

Do your best to find these words that are scattered throughout the 43rd weekly edition of Ice and Stone 2020. Words may be placed horizontally or vertically. Letters in the grid may be used in more than one word, but not all the letters in the grid have to appear in a word. More from Week …