Astronomy & Astrophysics published the first analysis of a catalog of 84 million individual stars in the Milky Way bulge as a part of the VVV (VISTA Variables in the Via Lactea) ESO public survey.

Color-magnitude diagrams for all bright stars within 1,000 light-years of the sun as determined by Mt. Wilson astronomers in 1935. (Left) Diagram without the subgiants, in which it is difficult to ...

Russell drew a simple system of coordinates with x- and y-axes, familiar to schoolchildren from geometry lessons. On this diagram, he entered the stars according to their spectral type or temperature ...

Using a whopping nine-gigapixel image from the VISTA infrared survey telescope at the European Southern Observatory’s (ESO) Paranal Observatory, an international team of astronomers has created a ...