After almost 9 years in space that included an unprecedented July 4th impact and subsequent flyby of a comet, an additional comet flyby, and the return of approximately 500,000 images of celestial objects, NASA's Deep Impact mission has ended.
A big problem with the use of electric rocket engines known as Hall thrusters has been erosion of their discharge channel walls, limiting their use to the inner solar system.
NASA's Juno spacecraft executed a deep space maneuver earlier today, with the burn occurring more than 298 million miles (480 million kilometers) away from Earth.
A group of ex-NASA astronauts and scientists is aiming to keep the world safe by launching the first privately-funded deep space mission and scanning the solar system for dangerous asteroids.
Are we alone in the universe? Russian scientists don’t think so.
NASA's announced its plans for the US spacecraft it hopes will take human beings into deep space.