Compound, or catadioptric, telescopes combine lenses and mirrors for a compact option, suitable for both planetary and ...

Yerkes Observatory near Lake Geneva is more than 125 years old, is the site of numerous scientific discoveries, is home the world's largest refracting telescope and has been visited by the likes ...

A new summer exhibition in the First Floor Gallery of the Albert and Shirley Small Special Collections Library explores the ...

Peering at the sunlit skies through a Vatican-owned space telescope and calling the last surviving member of the Apollo 11 ...

Kepler's Contribution — Early Refracting Telescopes One of the biggest limitations of Galilean telescopes, with their combination of a convex and concave lens, was their narrow field of view.

If you’re visiting Greenwich we’ve mapped out the ideal walking route for you to see all its filming locations.

After its voyage past Mars, Mariner 4 maintained intermittent communication with JPL and returned data about the interplanetary environment for two more years. But by the end of 1967, the spacecraft ...

One amateur astronomer is on a quest to identify every object in the catalog of Lynds’ dark nebulae. Tag along for the ...

Peering at the sunlit skies through a Vatican-owned space telescope and calling the last surviving member of the Apollo 11 spaceflight mission was how Pope Leo XIV celebrated the anniversary of the ...

Using a dedicated telescope for your astrophotography allows you to get professional images of any celestial target.