A rare second full Moon of the month, known as a "Blue Moon", is seen over Cincinnati, Ohio August 31, 2012 in this NASA handout. The family of Apollo 11 Astronaut Neil Armstrong held a memorial service celebrating the his life earlier in the day in Cincinnati. Armstrong, the first man to walk on the moon during the 1969 Apollo 11 mission, died August 25, 2012. He was 82. (REUTERS/NASA/Bill Ingalls/Handout)

Check out the online reactions, photos, and comments about tonight's rare "blue moon" that shone for the world to see.