The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

suitable for viewing planets. You don't have to break the bank, though; we've selected telescopes for a range of budgets. If you want to look beyond our solar system, we've got the best telescopes ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...