U.S. Navy Captain and NASA astronaut Chris Cassidy was appointed chief of the Astronauts Office in July 2015. Cassidy is a graduate of York High School in Maine. He is also a member of the U.S. Navy Seals and won two bronze stars for combat leadership in Afghanistan. Captain Cassidy as an astronaut, spent 182 days in space, but that is 158 days shy of astronaut Scott Kelly who just returned to Earth after 340 days in space.

Kelly holds the record for the most time spent in space by a human being. In that time he circled the globe 5,500 times and traveled 144 million miles. To put that in perspective he could have gone back and forth to the moon 300 times.

Astronaut Kelly also grew 2 inches after spending a year in space. He has an identical twin brother and now Kelly is the taller of the two. Now he has a 'little' brother.