It turns out that a common physical process called diffusion can explain the orbits of faraway minor planets – no need for a Planet Nine.
The search for new objects, including new planets, in our solar system has turned up some interesting finds. There have been a few failures over the years too.
A new planet in our solar system? Let's get direct proof before we start naming it.
Is it a dwarf planet, an asteroid or a comet? All of the above? Well, with the latest results about Ceres, researchers aren't entirely sure anymore.
Space scientists have a busy decade ahead with plans to visit Jupiter, Mars, Mercury and other interplanetary bodies all on the cards.