Telescopes are specialist optical instruments that have been around for over 400 years and are useful for many applications including seafaring, military operations and especially stargazing. But not ...

Light travels at different speeds based on the medium it passes through. For example, in a vacuum, it travels at 3.0 × 10^8 m/s in a straight line. But when directed towards glass, air, diamond, water ...

BestReviews is reader-supported and may earn an affiliate commission. Details. This is an archived article and the information in the article may be outdated. Please look at the time stamp on the ...

Scientists have developed an impossibly thin telescope lens that addresses a key astronomical challenge in a new study funded by NASA and DARPA.

In my opinion, the best telescope design for smaller apertures is the refractor. In the 3- to 5-inch range, these are typically small and light, easy to store and transport. They are simple to mount, ...

From ribosomes assembling proteins to viruses attacking cells, the main dramas in biology happen on a scale that is, tantalizingly, just one order of magnitude below the resolution of the best optical ...