Looking for a sky event this week? Check out our full Sky This Week column.  December 24: Ceres makes us see double As Orion and Gemini rise in the east after dark, they carry between them the lesser-known constellation Monoceros. Within this star pattern is our target for tonight: the festive Christmas Tree Cluster.  Cataloged as NGC Continue reading "The Sky Today on Thursday, December 25: Celebrate with the Christmas Tree Cluster" The post The Sky Today on Thursday, December 25: Celebrate with the Christmas Tree Cluster appeared first on Astronomy Magazine .