Deep space exploration

Astronauts lose additional bone due to space radiation, but not muscle: Study

Manned mission to Mars and beyond: Donald Trump signs NASA bill to send humans to Red Planet by 2033

Model prototype of China's 2020 Mars probe under development, confirms official

NASA ponders smaller experiments to 'hitch a ride' to the Red Planet

After record-setting satellite launch, ISRO aims for Venus and Mars; may partner with NASA!

NASA gears up to explore the early solar system; announces two new robotic missions!