The real one is more random ... He began to suspect that our solar system’s history had been anything but smooth—that it had somehow endured a “global gravitational instability,” as ...

Discover how a giant interstellar cloud known as the solar nebula gave birth to our solar system and everything in it. The solar system as we know it began life as a vast, swirling cloud of gas and ...

However, we actually have six in our Solar System. Pluto, Ceres, Makemake, Haumea, and Eris were the only five that we knew about up until very recently. Ceres is in the asteroid belt between Mars ...

Our solar system used to have nine planets ... it has found the most compelling evidence yet that the hidden planet is real. The search for Planet Nine has only recently kicked into gear, but ...

Everyone knows about the Solar System, and the planets that make it up. They’re in space, orbiting the Sun, in an order we all at least used to be able to recite. But it was not always so.

The Kuiper Belt extends from the orbit of Neptune, which around 30 astronomical units from the Sun, out to around 50. The New ...