A group of physicists decided to estimate how long it would take us to reach other star systems in the Milky Way using existing spacecraft.
One of NASA's spacecraft may have flown past a planet-moon system teeming with life without knowing it.
NASA engineers shut down one of Voyager 2's key scientific instruments to extend the spacecraft's life as its power supply dwindles.
For about 5 months, experts tried every way to fix the error and restore communication for Voyager 1, a ship that had been operating for nearly half a century.
Voyager 2 spacecraft left Earth in 1977, until December 10, 2018, it officially left the Solar System, about 18 billion km from our planet.
Uranus has a self-rotating axis that is almost parallel to the orbital plane and moves very slowly around the Sun.
US scientists on September 12 confirmed NASA's Voyager 1 probe was out of the solar system, marking the first time a human spacecraft has gone so far.
The Voyager 2 spacecraft is an interplanetary unmanned spacecraft launched on August 20, 1977