On the following night the great refractor of the observatory ... Our photographic telescope was made up of parts of several instruments, roughly patched together. The cross-wires were Illuminated ...

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

If you think that choosing the most powerful home telescope is just as simple as finding one with the highest magnification capability, then you’re wrong! There are many other key factors affecting a ...