Voyager to leave solar system on interstellar journey 

Launched by NASA in 1977, the Voyager 1 spacecraft has been operating for 34 years, 9 months and 17 days.  

Organics appeared naturally as solar system formed

Complex organic compounds probably formed easily in the early solar system, say scientists at the University of Chicago and NASA Ames Research Center.

What color is the Vesta asteroid?


Just how old is Jupiter, exactly?


Did solar system once have fifth giant?

The solar system could once have had a fifth giant planet, which got hurled out into space billions of years ago.

Planetary system looks very like our own


Best-known comets may be visitors from other stars

Many of the most famous comets in history, including Halley, Hale-Bopp and McNaught, may have come to our solar system from elsewhere.