This is an image from NASA’s Hubble Space Telescope of NGC 4449, one of the dwarf galaxies in the Galaxies Losing Oxygen via Winds (GLOW) study. Researchers found that dwarf galaxies can hold onto only a small fraction of the oxygen made by their stars.

CSA (Canadian Space Agency) astronaut and Expedition 75 flight engineer Joshua Kutryk is pictured during a spacewalk with his spacesuit's helmet visor down to install a new roll-out solar array on the International Space Station's port side truss structure.

The four-member Crew Health and Performance Exploration Analog (CHAPEA) crew poses outside for the first time in more than a year following the end of their simulated Mars journey on Oct. 31, 2026.

NASA’s James Webb Space Telescope’s mid-infrared view reveals intricate structures within the Cat's Head Nebula, traced by the emission from warm dust and carbon-based molecules excited by starlight.

A sinuous spiral galaxy (center) appears in the same field of view as a vivid gravitational lens (right corner) in this Hubble image.