I think the Celestron NexStar Evolution 9.25" is the best premium GoTo scope you can buy and it has a huge saving of $450 ...

Are monoculars suitable for astronomy? The simple answer is yes, but with a few limitations that you should be aware of ...

Price history: The Unistellar eVscope 2 was slightly cheaper earlier this year when it had a discount of $1,150 on Amazon.

Lippershey then experimented with lenses in a tube and settled on a design which combined a ... based entirely on what people ...

Upon arrival at NASA's Goddard Space Flight Center, the Optical Telescope Assembly for the agency's Nancy Grace Roman Space Telescope was lifted out of the shipping fixture and placed with other ...

[Bill Hammack] elaborates on one such piece of engineering: The Alignment Optical Telescope. The telescope was used to find the position of the Lunar Module in space so that its guidance computer ...

Note that you can control this telescope only with its controller, so you should be comfortable pressing buttons and reading a small screen instead of pushing the optical tube into position.

Place those lenses in a tube and voilà, you have a spyglass ... Despite myriad embellishments, however, most optical telescopes in use in the 21st century derive from the two types developed ...

NASA’s Nancy Grace Roman Space Telescope is one giant step closer to unlocking the mysteries of the universe. The mission has now received its final major delivery: the Optical Telescope Assembly, ...

Service providers align, repair, and recoat mirrors and lens sets; strip and recondition optical tube assemblies; and install new and more effective seals and pressure relief hardware. The most common ...

After all, as a refractor telescope it uses a lens to form an image so it’s necessary to stand behind the optical tube to look through an eyepiece. There are fewer telescopes easier to set-up ...