Blue moon: how to see tonight’s 'rare' event

If it is clear tonight, step outside and marvel at the full moon. Its heavy, illuminated orb will trace a path right across the sky from horizon to horizon during the twilight and nighttime hours. It will be shining in the reflected light of the Sun, as normal, and will appear yellow/white, as normal, yet we call it a blue moon because, well … here’s where the story gets interesting.

http://www.theguardian.com