Henrietta Leavitt joined the Harvard College Observatory as a volunteer in 1895. She was appointed to the permanent staff in 1902, and eventually became chief of the photometry department. She worked ...

Using ESO’s Very Large Telescope Interferometer (VLTI) at Cerro Paranal, Chile, and the CHARA Interferometer at Mount Wilson, California, a team of French and North American astronomers has discovered ...

Using ESO's Very Large Telescope Interferometer (VLTI) at Cerro Paranal, Chile, and the CHARA Interferometer at Mount Wilson, California, a team of French and North American astronomers has discovered ...

Scientists have clocked the speed of Cepheid stars -- 'standard candles' that help us measure the size of the universe -- with unprecedented precision, offering exciting new insights about them.

An high resolution image is available at http://www.eso.org/public/outreach/press-rel/pr-2008/phot-30-08.html Pulsating stars enable a new precise determination of ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. A quick glance up at a dark night sky reveals a wondrous assortment of ...

New, vry precise measurements show that the rotation of the Milky Way is simpler than previously thought. A remarkable result from High Accuracy Radial Velocity Planet Searcher (HARPS), the most ...

“Classical Cepheids” are a type of pulsating star that rhythmically brightens and dims over time. These pulsations help astronomers measure vast distances across space, which makes Cepheids crucial ...