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 ...

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The winter months are fast approaching the Northern Hemisphere -- meaning longer, darker nights longed for by amateur astronomers. To the beginner, setting out on their first tentative steps to ...

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In order to be seen, light from objects needs to reach our eyes. Therefore, objects that are far away don’t reflect enough light back for us to see them. The objective lens of a traditional telescope ...

THE Yerkes Observatory, which has recently been completed and inaugurated, contains in its instrumental equipment the largest refractor in the world, the diameter of the object-glass spanning 40 ...

The original instrument to occupy the 25-foot diameter dome was the 10.5-inch Bausch refracting telescope (f/15.5) installed in the brand new observatory in 1953. Bausch & Lomb Company gave the ...

For thousands of years, humans observed the stars with nothing but our own eyes. But eyes can only get us so far, and to see all the way to the ends of the universe we needed to invent some tools. The ...

After 400 years, the original telescope design is getting a major upgrade. Part of a DARPA funded project, Lockheed Martin's Segmented Planar Imaging Detector for Electro-optical Reconnaissance ...

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 ...

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