Science Updates - A look at CfA discoveries from recent journals

artist's depiction of the XMM-Newton spacecraft
January 24, 2020

A Cepheid variable star is one whose particular mass and age (along with some of its other physical parameters) result in brightness oscillations with a precise period proportional to the star's intrinsic luminosity.

Blanco 4-meter telescope, Cerro Tololo Inter-American Observatory, Chile
January 17, 2020

The Dark Energy Survey (DES) program uses the patterns of cosmic structure as seen in the spatial distribution of hundreds of millions of galaxies to reveal the nature of "dark energy," the source of cosmic acceleration.

illustration of vibration modes in the Sun
January 10, 2020

The interiors of stars are largely mysterious regions because they are so difficult to observe. Our lack of understanding about the physical processes there, like rotation and the mixing of hot gas, introduces considerable ambuguity about how stars shine and how they evolve.