New Delhi, March 19 -- The National Aeronautics and Space Administration (NASA) explained on Wednesday how the body astronauts will struggle as they come home after spending a long time in space. A NASA official said the astronauts may undergo "vascular and cardio reconditioning" and may feel "dizzy" as their bodies readjust to Earth's gravity.

NASA astronauts Nick Hague, Sunita Williams, and Butch Wilmore and Russian cosmonaut Aleksandr Gorbunov returned to Earth on March 19. They splashed down off the coast of Florida near Tallahassee. This marked the end of Sunita Williams' and Butch Wilmore's space saga that kept the world on the hook for nine months.

Sunita Williams and Butch Wilmore, who launched aboard the Starliner spacecraft in...