In the past, my only experience with apochromatic refractors was with an occasional cursory glance through the eyepiece of one set up at a star party. For this reason, I was eager to test-drive ...

There are few places in Wisconsin that can claim as many discoveries as the Yerkes Observatory near Lake Geneva. The Observatory is more than a century old and houses the world’s largest refracting ...

More than 300 people traveled thousands of miles to a remote mountaintop in Chile for the dedication of two of the most powerful survey instruments ever built: the Baade and the Clay 6.5-meter ...

The Dobsonian, John Dobson’s sidewalk telescope mount design more commonly referred to as a Dob, has evolved significantly since its first commercial introduction in the 1980s. Many of us remember the ...