Really now? In the range of one week before the new moon until one week after, plus one week before the full moon until one week after? How extraordinary.
Jeff: Yes. See ... oh crap, Bill didn't post here. Let me paste from facebook: "4 weeks of 7 days gives 28 days (and the Synodic Month is really 29.5 days, not 28), which leaves a day or two at the end of the month for the remaining 10%." (From my friend Bill Gawne, astronomer.) (and hi, Jeff :D )
I collect natural history, environmental, and geography books, almost compulsively. I look for used versions where I can (to save paper) but also appreciate that many of these books come out in runs of a few thousand copies, and aren't profit-makers for the publishing companies, so when they come out new, I buy them while they're new. If you like Geographile and want to let me know, please either comment on my posts, or visit my Powell's wishlist to feed my book collection. You might find books you like there, too.
I am a middle-aged geographilic student and writer. You can find me on Twitter as @geographile (mostly geographilic feed/retweets/info) and @mactavish (more personal, still science-oriented).
5 comments:
Really now? In the range of one week before the new moon until one week after, plus one week before the full moon until one week after? How extraordinary.
*daha*
Only 90%?
Jeff: Yes. See ... oh crap, Bill didn't post here. Let me paste from facebook: "4 weeks of 7 days gives 28 days (and the Synodic Month is really 29.5 days, not 28), which leaves a day or two at the end of the month for the remaining 10%." (From my friend Bill Gawne, astronomer.) (and hi, Jeff :D )
Hi Mary!
By my math, 28/29.5 = (roughly) 94.9%, which is why I was 90% seemed low to me.
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