article_snippet.sent: Saturday, starting a total lunar eclipse for nearly five minutes -- what NASA says will be the shortest such eclipse of the century.
article_snippet.sent: The lunar eclipse is looking good!
article_snippet.sent: A lunar eclipse happens when the sun, Earth and moon form a straight line in space, with the Earth smack in the middle.
article_snippet.sent: NASA says lunar eclipses typically happen at least twice a year, but A lunar eclipse is the third in a series of four in a row, known as a "tetrad."  
highlights_snippet.sent: The total eclipse lasted 4 minutes and 43 seconds .
  