Coordinates in the Sky "The purpose is to be able to uniquely specify a location in the sky. It's just like latitude and longitude on Earth," Rick Fienberg, press officer for the American Astronomical Society, explains in an email. "If you tell someone to meet you in Littleton, Colorado, at 39°36'47.9484''N, 105°0'59.9292''W they will not only know which town you're in but also which street corner you're waiting at.... It wouldn't be very useful to someone else to know only which town you're in — you need to be more precise if you have any hope of being found by the other person." … [Read more...] about How Do We Find Things in the Blackness of Space?
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Launched in 2012, Giving Tuesday (often styled with a hashtag as #GivingTuesday) was created by the Belfer Center for Innovation & Social Impact at the 92nd Street Y. This New York City-based cultural center sought to use a social media-based platform to kick off the charitable giving season, while also encouraging donors not to wait until the end of the year to make contributions. The organization teamed up with the United Nations Foundation and executives from Mashable, Facebook and Groupon to spread the word about the day. … [Read more...] about After Cyber Monday, People Open Their Wallets for Giving Tuesday