Straightforward Curious George 3 Back to the Jungle
(off by about 2 1/2days) Chapterless Do you know how this first transit was observed? With whattechnology? george Musser the first one DELIBERATELY observed (and recorded) was in 1639 minfy133 Oh! I understand now! Thanks ^^ george Musser @chapterless the two English astronomers who say it usedrudimentary telescopes Mary Starr FWIW: en.wikipedia.org/wiki/Transit_of_Venus,_1639 Robin Lloyd Here’s a chapter that describes the transit observation andprediction by Horrox in 1639: article.cfm?id=man-who-knew-venus-would-transit-sun-excerpt jmtsn So the ~2.5 days explains why we won’t see another tr
minfy133 Oh I see… but where did the 5 come from the 5 * 584 calculation? george Musser @minfy133 just from looking for the next integer multiple. 584 days= 1.6 years = 8/5 years, so when Earth does 5 laps, and Venus 8,they return to where they were. the trick, though, is that theratio is not EXACTLY 1.6, but 1.59-something.
she was only a year old in 2004 markfischetti My question: Why is the transit pattern two within a couple years,then nothing for a century? george Musser @markfischetti the orbit periods of Earth and Venus are almost butnot quite in an integer ratio jmtsn @Mark, I was just wondering that too… george Musser @markfischetti @jmtsn so one transit is (usually) followed byanother 8 years later… it’s 8 years minus two and a half days. inthose 2 1/2 days, Venus moves vertically about 1/3 degree..
sharercushier 