Celestron C8-XLT with dovetail Losmandy type and ESATTO 2": Buy online | Primalucelab.com
NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) aircraft taxies on the flightline at Davis-Monthan Air Force Base, Ariz., Dec. 13, 2022. The SOFIA aircraft is a Boeing 747SP jetliner modified to carry