Launched by NASA in 1977, the Voyager 1 spacecraft has been operating for 34 years, 9 months and 17 days.
Complex organic compounds probably formed easily in the early solar system, say scientists at the University of Chicago and NASA Ames Research Center.
Since last July, NASA’s Dawn spacecraft has been orbiting the asteroid Vesta and transmitting gigabytes of images and other relevant data.
Particles from comet 81P/Wild 2 brought to Earth in 2006 by NASA's Stardust spacecraft seem to indicate that Jupiter formed more than three million years after the formation of the first solids in our Solar System.
The solar system could once have had a fifth giant planet, which got hurled out into space billions of years ago.
With the discovery of a fourth giant planet, astronomers are hailing the HR 8799 system as remarkably similar to our own.
Many of the most famous comets in history, including Halley, Hale-Bopp and McNaught, may have come to our solar system from elsewhere.