Divya Delhi:  Famous NASA astronaut Sunita Williams spent a lengthy period in space. Among her many accomplishments is spending nearly 9 months on the International Space Station. But what happened to her body after so long in space? Find out how 9 months in space affected her. Sunita Williams is a Navy officer and astronaut. NASA hired her in 1998 and she has flown twice. She was the second woman to command the International Space Station and set a record for longest female spaceflight in 2007. She spent 322 days in space, including her 9-month ISS mission. BBC Sky at Night reports that astronauts mature slower than Earthlings. Time travel is possible if you travel quickly enough through space. Sunita Williams' space trip revealed how aging may differ in zero gravity. Space can accelerate or slow aging. Astronauts like Sunita experience faster muscle and bone changes than skin or other aging indications. Some experts think astronauts' space time can teach us about aging. Understanding space body alterations may help us find strategies to decrease aging on Earth. Time dilation in space is illustrated by twins Mark and Scott Kelly. Scott has spent ten times longer in space than Mark, however both brothers have gone to the ISS. Mark was born six minutes before Scott, however NASA reports that Scott matured more slowly while flying at high speeds around the Earth, making Mark six minutes and 5 milliseconds older. With aspirations to travel to Mars, NASA is studying how space affects the human body and how to protect humans during long voyages. They help astronauts like Sunita Williams stay healthy with special exercises, nutrition, and medical treatment.