NASA chief Charles Bolden inspected a prototype spacecraft engine that could power an audacious mission to lasso an asteroid.
Spacewalking astronauts replaced a suspect ammonia pump.
The Kepler spacecraft lost the second of four wheels that control the telescope's orientation in space.
Astronauts were on mission to International Space Station.
NASA is paying $424 million more to Russia to get U.S. astronauts into space.
NASA blaming Congress for the need to pay $424 million more to get U.S. astronauts into space.
A private company contracted by NASA to make supply runs to the International Space Station scrubbed a Wednesday test launch of an unmanned rocket, saying an important data cord linked to the rocket's second stage detached too soon.
Russian citizen scientists point to what could be the Mars 3 lander along with its parachute, heat shield and other hardware.
Obama proposed spending nearly $35 million in his 2014 budget to refurbish a satellite, nicknamed GoreSat by critics.
A top senator says President Barack Obama and NASA are planning for a robotic spaceship to lasso a small asteroid and park it near the moon.
