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We propose and demonstrate a low-cost magneto-mechanical fiber micro-positioner for optical coupling, with a square-millimeter working range and a resolution of a few microns per pixel. We demonstrate ...

Two groups in Kolkata related to astronomy have created what they claim to be the largest handmade telescope in the city — a 14.5-inch f/5 Dobsonian that is low-cost, powerful, and easy to handle.

Scientists and optical observers in Kolkata have built the largest handmade telescope in the city. The 14.5-inch f/5 Dobsonian telescope was inaugurated in Shyambazar. It will be used for studying ...

Best For Beginners: Zhumell Z100 Altazimuth Reflector Telescope Wide Aperture: Apertura 10-Inch Dobsonian Telescope Best for Astrophotography: William Optics RedCat 71 f/4.9 APO Astrograph Refractor ...

The night sky is beautiful enough to look at with the unaided eye, but add a telescope atop a telescope mount, and you’ll have a true sight to behold. And, as important as it is to get one of ...

What exactly are Dobsonian telescopes? We explain their design and why they have such widespread popularity among astronomers. When you purchase through links on our site, we may earn an affiliate ...

Before I get too specific I want to emphasize that the main mission of your telescope is to gather as much light as you can. While magnification is important, light-gathering ability is much more ...

The observatory’s key instrument, the 1,000-foot (305-meter) diameter Arecibo radio telescope, was completed in 1963 and was the largest single-aperture telescope in the world until 2016, when ...

Finding secret spacecraft is what Felix Schöfbänker does. In June, the Austrian amateur astronomer spied a secret Chinese spaceplane. Now, Mr. Schöfbänker has spotted a mysterious American military ...