Solstice at Newgrange . ... Credit Copyright: Photograph by Cyril Byrne - courtesy of The Irish Times Explanation: Tomorrow's solstice marks the southernmost point of the Sun's annual motion through planet Earth's sky and the astronomical beginning of winter in the north. In celebration of the northern winter solstice and the International Year of Astronomy 2009 , you can watch a live webcast of the the solstice sunrise from the megalithic tomb of Newgrange , in County Meath, Ireland. ...