Juno: An inside look at NASA's mission to Jupiter
The spacecraft's arrival next month will reveal the composition of the largest planet.
Most of the Moon's water might have come from asteroids
Comets aren't as much of a factor as previously thought.
Watch Mercury cross the Sun starting at 7AM Eastern
You can view this rare celestial event online.
Scientists find a tailless comet from Earth's early days
The rocky body got kicked to the edge of the Solar System billions of years ago.
Scientists observe the largest solar system ever discovered
An exoplanet is a trillion miles from its star.
Astronomers may have found the Solar System's 9th planet
No, it still isn't Pluto.
Watch Pluto's mesmerizing space weather
NASA's Solar System weather simulation shows how quiet it was near Pluto when New Horizons showed up.
This is your closest look yet at a Kuiper Belt object
NASA's New Horizons probe spotted an object 3.3 billion miles away from the Sun.
Astronomers discover the most distant Solar System object to date
V774104 is thought to be 15.5 billion km from the Sun.