The moon turns red during a total lunar eclipse in Bernkastel-Kues, Germany, Friday, July 27, 2018. Skywatchers around much of the world are looking forward to a complete lunar eclipse that will be the longest this century.[Photo:AP/Harald Tittel]

A blood moon rises next to the statue of Nike, the goddess of victory, during a complete lunar eclipse in Warsaw, Poland, Friday, July 27, 2018. Skywatchers around much of the world are looking forward to a complete lunar eclipse that will be the longest this century.[Photo: AP/Alik Keplicz]

A full moon rises next to the Colosseum during a complete lunar eclipse, in Rome, Friday, July 27, 2018. The so-called "blood moon" Friday, when it turns a deep red, will be visible at different times in Australia, Africa, Asia, Europe and South America when the sun, Earth and moon line up perfectly, casting Earth's shadow on the moon.[Photo: AP/Gregorio Borgia]