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 ...

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

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 ...

Before making your purchase, it’s essential to have a basic understanding of the two different types of telescope and how they work. At a basic level, all scopes on the market can be labelled as ...