Four people from NASA's Crew-11 mission splashed down off San Diego, successfully completing five months aboard the International Space Station. The trip was cut short due to a medical issue.

In an unprecedented move, NASA is bringing an astronaut crew home early from the International Space Station because one astronaut has an undisclosed medical condition.

Struggling to have a second child, astronaut Kellie Gerardi uses her social media presence to let others know they're not alone.

A partnership between Columbus State University's Bo Bartlett Center and its Coca-Cola Space Science Center will provide a rare glimpse into American space exploration.

Astronauts face several risks during spaceflight, including exposure to radiation.

Frank Borman commanded two early NASA missions including Apollo 8, the first to orbit the moon. He was a no-nonsense astronaut known for his keen attention to detail and duty to country.

A new study of astronaut blood finds that space travel reduces the expression of 100 genes related to the immune system.

All week, On Second Thought has shared stories about people whose unsung contributions to the Apollo 11 mission 50 years ago. One of those pioneers is...