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
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It's a system that's been around since ancient times. "The idea of celestial coordinates does assume that the sky is a sphere that surrounds the Earth. This is the idea that traces back to the early belief that the Earth was the center of everything," Christopher Palma, a teaching professor and associate head for undergraduate programs in the Department of Astronomy and Physics at the Pennsylvania State University, says in an email. "Even though we now know that to not be true, it is still true that the sky appears to be a sphere surrounding us, so we can use spherical coordinates to identify any location on the sky." … [Read more...] about How Do We Find Things in the Blackness of Space?