The last full moon so big and close to Earth was in March of 2007 . Friday 's full moon will be the biggest in almost 20 years . When it 's at perigee , the moon is about 31,000 miles ( 50,000 km ) closer to Earth than when it 's at the farthest point of its orbit , also known as apogee . Saturday 's full moon will still be 211,600 miles away . This full moon will appear about 14 % bigger and 30 % brighter .
The last full moon so big and close to Earth was in March of 2007 . Friday 's full moon will be the biggest in almost 20 years . Saturday 's full moon will still be 211,600 miles away . This full moon will appear about 14 % bigger and 30 % brighter .