The Hubble Space Telescope captured imagery of Jupiter and its Great Red Spot in 2023 and 2024. Credit: NASA, ESA, J.

Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight ...

The largest visible-light telescope at FLWO is the MMT Observatory, which has a primary mirror 6.5 meters (21 feet) in diameter. Jointly operated by the Smithsonian and the University of Arizona, the ...