Simply put, a Dobsonian telescope is a type of large aperture Newtonian telescope design popularised by John Dobson back in the mid 1960s, and from whom it takes its name. Also referred to as a ...

With the telescope being a Newtonian design, it means the optical system must be collimated to perform at its very best. This can be a confusing and frustrating process for the beginner as it ...

Compact field-lens telescopes based on the doubly convex Keplerian design had become small enough to be stored away in the home when not in use. The amateur astronomer had been born. Newton's ...

Sir Isaac Newton built a reflecting telescope that used curved mirrors instead. Laurent Cassegrain improved upon Newton’s design in 1672 by using a concave primary mirror and a convex secondary ...

Sir Isaac Newton once wrote ... Building a better refractor The spyglass-turned-telescope had limitations, some of which Galileo was able to design around. To reduce distortions such as ...

a 12-inch f/4.9 Newtonian reflector complete with Orion’s IntelliScope object-location system. The XX12 is Orion’s first Dobsonian style telescope with an open truss-tube design. Recently ...

The spyglass-turned-telescope had limitations, some of which Galileo was able to design around ... until Isaac Newton solved it. Kepler's advance created a new challenge, however.

Try it! This telescope isn’t for targets on Earth. It’s Newtonian design demands that you stand or sit at the side of the optical tube. And the image is inverted. So it’s not a point and ...

Hamilton College and the Make-A-Wish Central New York will fulfill a wish for a 14-year-old child, Matthew, on for Friday, ...