Goode Solar Telescope, Solar telescope at Big Bear Lake, California, US

The Goode Solar Telescope is a major observing instrument with a 1.6-meter opening located at the Big Bear Solar Observatory at an elevation of 2060 meters. It uses a special Gregorian design that collects light from the side to produce images without obstruction.

First engineering light came in December 2008 and scientific observations began in January 2009 under the name New Solar Telescope. On 17 July 2017 it was renamed for Philip R. Goode, founding director of NJIT's Center for Solar-Terrestrial Research, who conceived the facility, raised its funds and assembled its team. It was the first facility-class solar telescope built in the U.S. in a generation.

The telescope is named after Philip R. Goode, who conceived it, raised the funds and assembled the team that built and commissioned it. It was renamed on 17 July 2017, having been known as the New Solar Telescope since its first engineering light in December 2008.

The telescope benefits from its location near Big Bear Lake, where atmospheric conditions remain stable and allow for excellent observations. An adaptive optics system automatically compensates for air turbulence to deliver sharp and detailed images of the sun.

The instrument can detect solar features smaller than 50 kilometers, which represents extraordinarily high resolution. This capability comes from its special off-axis Gregorian design that avoids light loss and allows extremely detailed observations.