The formation of our Solar System leaves a lot of unanswered questions, but as we continue to study it in more detail with the countless spacecraft and telescopes we have in space today, we also ...

If you travel far enough away from the Sun, the Solar System becomes a lot more populated. Out past the orbit of Neptune lies the Kuiper Belt, a vast, ring-shaped field of icy rocks. This is where ...

Next year, in July 2015, the New Horizons probe will zip past Pluto at high speed, taking high-res images and detailed observations the whole time. We’ve never seen the ice ball up close before, so ...

Pluto's status as our solar system's ninth planet may be safe if a recently discovered Kuiper Belt Object is a typical "KBO" and not just an oddball. Astronomers have new evidence that KBOs (Kuiper ...

In 1992, astronomers David Jewitt and Jane Luu discovered the first Kuiper Belt object (KBO), providing the context for Clyde Tombaugh’s planet Pluto. Scientists soon discovered dozens, then hundreds, ...

Pluto's status as our solar system's ninth planet may be safe if a recently discovered Kuiper Belt Object is a typical "KBO" and not just an oddball. Astronomers have new evidence that ...