After only four short years, NASA’s James Webb Space Telescope (JWST) and observational cosmologists like Richard Ellis at University College London (UCL) have pushed the cosmic lookback time to an era when the universe’s very first stars and galaxies are within observational reach.

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NASA Administrator Jared Isaacman on Wednesday defended the makeup of the space agency’s latest Artemis crew, an all-male group.

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A compact, multifrequency radar built by a team at NASA’s Jet Propulsion Laboratory will make it easier to collect information about dynamic cloud systems. Called CloudCube, this new instrument simultaneously probes the atmosphere with three radar signals, spanning 36 to 240 GHz, for optimized sensitivity to a wide range of water droplet and ice particle […]

The moon may look unchanged from afar, but its surface is constantly reshaped by microscopic impacts and a steady stream of particles from the sun, a process known as space weathering. Now, Georgia Tech researchers have recreated one of those weathering sources, solar wind, in the lab—offering new insight into how the lunar surface evolves. […]

The complex puzzle known as little red dots has become more complete since their initial discovery by NASA’s James Webb Space Telescope in 2022. Now a particular little red dot’s spectrum is helping connect many of the pieces.

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There’s a question at the heart of SETI that doesn’t get nearly enough attention. It isn’t whether aliens exist, and it isn’t whether we have the technology to detect them. It’s a far more practical problem: With a billion stars in our galaxy and finite telescope time, how do you decide which ones to actually […]