Beyond Neptune lies the Kuiper Belt, a vast region of icy bodies that holds the secrets to the solar system’s formation.

The classic view of our solar system contains eight orderly planets, some with moons in neat orbits – but when we look closer, we discover a bunch of stuff missing from this simple, clockwork model.

Solar payback periods can vary widely, and also depend on how you pay for the system in the first place. "There's a lot of factors that play into that for any given home or household," said Becca ...