Astronomy college course/Wikipedia Sidereus Nuncius/Quiz01/10

Contributions by mikeu talk
There's a typo in No. 10 "When the German astronomy Marius" --mikeu talk 20:58, 2 January 2016 (UTC)
 * Way to go mikeu! But everybody, there is still much to do: Can you write a short essay that makes this an interesting fact? Can you find a reference for this fact? (How do we know its actually true).  Can you write a similar question with different wording so that the testbank becomes so large that very few students could read it in a semester?--Guy vandegrift (discuss • contribs) 21:10, 2 January 2016 (UTC)


 * Here's the reference. It is behind a paywall, but all the facts cited at wp are freely available in the abstract. --mikeu talk 23:23, 2 January 2016 (UTC)




 * Here's more detail. --mikeu talk 23:45, 2 January 2016 (UTC)