Standing on shoulders Both types of telescopes—Galileo's refractor ... that by using two different kinds of glass together in the objective lens, they could cause the red and blue ends of ...

There are three main types of telescope you'll see reduced, and each has different advantages, so we've explained each one below - so you know what to look out for. You can also check out our best ...

Here's how an innovative flat lens could solve these problems for satellites and space-based telescopes. Understanding ...

Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...