Gas in the halos of galaxies dominates the universe's baryon budget, traces its dark-matter potential wells, and supplies the fuel for star formation. Circumgalactic gas has also long been suspected to regulate galaxy...

Measuring and Reducing the Gender Gap in the Mathematical, Computing, and Natural Sciences is a webinar on the Gender Gap in Science Project, an International Science Council-funded project.

Whenever an observation of an astrophysical source must be converted from instrumental values to physical units, we use flux calibration. As new questions are formulated and new capabilities become available, the...