The Science and Spirit of the Winter Solstice Astronomy 

The Science and Spirit of the Winter Solstice

By Jonathan Trinastic @jptrinastic If you happen to walk the beautiful slopes of Machu Picchu this summer, look for the ruins of a solitary tower built around a single slab of stone. Arrive early in the morning around June 20. You should find the sun shining through a window at just the right angle to illuminate a slim groove etched into the stone. Long ago, this annual sign was cause for celebration! Each year, the event marked the winter solstice in the Southern Hemisphere, the shortest day of the year…

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global warming Environment Videos 

Global Warming: What’s Really Warming the Earth?

Dr. Joe Hanson explores the possible causes of global warming in this episode of It’s Okay To Be Smart.   References and Further Reading July 2016 is hottest on record NOAA’s State of the Climate July 2016 Bloomberg’s climate change data viz project Solar activity and temperature show opposite trend Milankovitch cycles (I left out eccentricity because it operates on scales so long that it doesn’t affect short-term climate change) Connecting climate models with actual temperature changes NASA Goddard’s Gavin Schmidt explains the history of the instrumental temperature record Last time…

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