Inside the World's Largest Refractor at Yerkes Observatory: Explore Scientific Experiences

Yerkes Observatory, founded in 1897 by George Ellery Hale and financed by businessman Charles T. Yerkes, is the birthplace of modern astrophysics. The observatory changed the face of astronomy from being a mere housing of telescopes and astronomers to being an integration of optics with a laboratory for chemistry and physics. Those who worked at Yerkes Observatory represented a who's who of astronomers, scientists, and physics icons including Hale, Barnard, Hubble, Einstein, and Sagan.

Astronomer Dan Koehler who conducts the Public Observing Program at Yerkes through the world's largest refractor, the 40-inch, at Yerkes Observatory, discusses some of the history of the Great Refractor and how it is being used today to educate the public, and why he chose Explore Scientific Waterproof Eyepieces, in his effort to find the optimal optics to give the best visual experience.

Every month during the year, on select weekday and weekend evenings, Yerkes Observatory offers observing sessions with the "Great Refractor", the 40-inch Refractor Telescope, the largest refracting telescope in the world, weather permitting, for participants who are age 10 and older.

You can experience the amazing views through the 40-inch Refractor for yourself: https://explorescientificusa.com/coll...