You may have heard of Lagrangian points — they are five gravitationally stable locations around our planet, created by the forces exerted by the Earth and Moon on each other. They're a perfect place to put a satellite (and indeed we have). In this incredible model, you can see exactly where they are, and why.
A newly-discovered asteroid near Neptune holds several clues about the early formation of our solar system.
You've heard of space explorers exploiting gravity to save fuel, but using a new method, spacecrafts could, with a little push, roll through the solar system mostly unaided. It's like rolling downhill all the way to work to save gas.
The Earth is surrounded, it's said, by cosmic flypaper areas of space that cancel gravity and trap unwilling objects inside. Quite what those objects are have remained a mystery... but we're about to find out.