Humans generally like stability. We are used to our small, predictable world: Every 24 hours, we rotate on our axis; every 365 days, we revolve around the Sun. We have followed this pattern for ...

While this concept isn't foreign to us, it can be difficult for our puny human brains to grasp. But in just a few minutes, you can get a crash course on how big our solar system is, thanks to this ...

Amy Mainzer uses a soccer field to explain the distance of the planets to the sun.

The size of the solar system is defined by the volume of space over which the sun’s influence exceeds those of other nearby stars in the Milky Way galaxy.

That means our solar system, which is defined by objects still in a gravitational orbit around the sun, could stretch out a light-year or more.

Just how big is our solar system? This interactive graphic shows you exactly how big by putting you in the driver’s seat of a rocket ship and posting all the milestones you pass along the way ...

Astronomers have uncovered a massive new trans-Neptunian object, 2017 OF201, lurking at the edge of our solar system. With an ...

The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...