Famous astronaut Scott Kelly is about to come home - here are 8 epic numbers about his record-breaking time in space

Famous astronaut and Instagram star Scott Kelly is about to set a course home to Earth after spending a record 340 days in space - longer than any other NASA astronaut in history.

On Tuesday, March 1, Kelly is scheduled to undock with the International Space Station. Less than four hours later, he'll be back on Earth, in Kazakhstan.

Kelly's year in space has been a critical mission for NASA, helping to reveal details that'll be key to future missions to Mars, like how the human body reacts to long-term stays in zero gravity.

During his time in space, Kelly drank nearly 200 gallons of recycled urine and sweat and traveled over 140 million miles, according to The New York Times. Here are some more extreme numbers from the NYT about Kelly's historic time in space: