2019-12-01_Astronomy
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WWW.ASTRONOMY.COM 21 THE EXPLORATION OF PLUTO WASN’T EASY, BUT IT SURE WAS WORTH IT. As David Grinspoon and I recount in our boo ...
22 ASTRONOMY • DECEMBER 2019 fast f lyby. It’s also needed because Pluto’s surface and atmosphere are evolving with time and beg ...
10 km 10 miles Styx Nix Kerberos Hydra Charon This composite image shows part of Pluto’s largest moon, Charon, and all four smal ...
24 ASTRONOMY • DECEMBER 2019 colleagues Tiffany Finley, Mark Tapley, John Scherrer, and Amanda Zangari (who is now at Lincoln La ...
WWW.ASTRONOMY.COM 25 atmosphere for sampling multiple times. And it will f ly over Pluto’s poles many times, as well as out into ...
26 ASTRONOMY • DECEMBER 2019 between going wide in studying other dwarf planets and going deep in Pluto studies, we dubbed the r ...
the Dawn propulsion system can even place the Pluto orbiter around a second dwarf planet for another orbital mission. These brea ...
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WWW.ASTRONOMY.COM 29 Revered as a great thinker and scientist, he was also obsessive, secretive, vindictive, and paranoid. BY RA ...
30 ASTRONOMY • DECEMBER 2019 angry outburst in which he had threatened to burn the house down around his mother and stepfather. ...
WWW.ASTRONOMY.COM 31 that color perception was caused by pressure exerted on the eye by swirling vortices. Newton read about thi ...
32 ASTRONOMY • DECEMBER 2019 instant hit. On January 20, 1665, Samuel Pepys, clerk of the Royal Navy and future president of the ...
WWW.ASTRONOMY.COM 33 in 1684. Newton immediately tried to prove his prece- dence and started an acrimonious debate that lasted f ...
34 ASTRONOMY • DECEMBER 2019 One of the articles to which Newton would need to swear was a belief in the Holy Trinity. This repr ...
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WWW.ASTRONOMY.COM 35 these symptoms could have all been the result of mercury poisoning. Alchemists thought mercury played a maj ...
SKY THIS MONTH Visible to the naked eye Visible with binoculars Visible with a telescope 36 ASTRONOMY • DECEMBER 2019 December b ...
WWW.ASTRONOMY.COM 37 RISING MOON I The young Moon’s lonesome sea ON DECEMBER’S FIRST EVENING, Mare Crisium (Sea of Crises) domin ...
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