Using NASA’s Chandra X-ray Observatory, scientists have discovered a new class of objects behaving unlike any they have seen before.

NASA astronaut and commander of the agency’s Artemis II mission, Reid Wiseman, a Baltimore native, takes a selfie with fans at an NFL game between the New Orleans Saints and the Baltimore Ravens at M&T Bank Stadium, Sunday, Sept. 20, 2026, in Baltimore.

UC Berkeley engineers and managers watch as the COSI (Compton Spectrometer and Imager) detector assembly is slowly raised from a table in this July 8, 2026, image.

The rollout ceremony for NASA’s first space shuttle, OV-101, coincided with Constitution Day of the nation’s bicentennial on Sept.17, 1976. Although the orbiter was originally planned to be named Constitution, Star Trek fans successfully convinced President Gerald Ford to name it Enterprise after the series’ fictional starship.

Anak Krakatau erupts ash and volcanic gases in this image acquired with the OLI (Operational Land Imager) on Landsat 8 on Sept. 5, 2026.