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

If your search to the best telescope for stargazing has led to a world of jargon and confusion, we're here to help. A refractor or refracting telescope uses an objective lens to collect light and ...

Well, any of us who has ever looked through a telescope could say the same, for the two principal types in use today were developed by giants: the refractor by Galileo and the reflector by Newton.