NASA's Advanced Composite Solar Sail System (ACS3) can be seen with the naked eye as it orbits Earth, and can be tracked with a helpful app. An experimental NASA solar sail can be seen in the ...

Scientists have discovered a comet traveling one way out of the solar system after a close encounter with Saturn. The comet, designated Comet A117uUD (A117uUD), was only discovered on June 14 ...

Check out the rest of the series. If you were born in the last century you might have memorized that there were nine planets in our solar system, as heard in the famous Schoolhouse Rock!