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Bob516

Former undergraduate physics and astronomy major, many decades ago.

I'm writing a science fiction novel, and want my use of science and technology to be as accurate as possible, and to use real world information to give added detail to the scenes in my book.

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13 At Mars' equator how long does twilight last? Dec 20 '19
12 Whereabouts of the Pleiades May 12 '19
8 Why is Ganymede's aurora only visible in ultraviolet while Earth's is bright green and red? Jan 14
7 Are any bow shocks seen in the visible spectrum? Jun 7 '19
6 Is the gravitational field of the sun uniform? Jul 4
6 Are meteors visible on Mars? Dec 18 '19
6 When do radio and tv signals become indistinguishable from background noise of the universe? Nov 14 '19
5 Is the nose of the solar system and the solar apex the same thing? Dec 6 '18
5 Could Ganymede's aurora be seen with the naked eye? May 14 '19
4 As matter approaches a black hole, does it speed up? May 1 '19
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