he Milky Way has a diameter of approximately 100,000 light years, meaning that it would take light that long to travel from one end to the next. Our Solar System – comprising the Sun, its orbiting planets, comets, asteroids and all kinds of other space bodies – doesn’t have a clear boundary. But if you use the orbit of its furthest known objects – the cloud of comets called the Oort Cloud, much farther from the Sun than
