Massive clusters of galaxies, some with more mass than a hundred Milky Way galaxies, have been detected from cosmic epochs as early as about three billion years after the big bang. Their ...

Mark Reid, a Senior Radio Astronomer at the Smithsonian Astronomical Observatory, which is a part of the Center for Astrophysics | Harvard Smithsonian, was elected to the membership of th...

Low mass stellar objects include both low-mass stars (less than about one half of the Sun's mass) and substellar brown dwarfs which, having less than about eighty Jupiter-masses, are unab...

Washington, DC The Smithsonian today made available a new online interactive that allows users to explore a three-dimensional (3D) visualization of the remnants of a supernova, or explod...

X-ray observations have found copious amounts of very hot gas in galaxy clusters, and in the central regions more than was expected. While supernovae and shock excitation will heat the ga...

BERLIN, Germany & AMADO, Ariz. - Scientists in the VERITAS (Very Energetic Radiation Imaging Telescope Array System) Collaboration have published a paper in Nature Astronomy journal...

The closest exoplanet to us, if we include only single stars like the Sun, is the planet around Barnard's Star, Barnard's Star-b ("BSb").

A Resource for X-ray Astronomers At high temperature and density, collisions strip electrons away from nuclei, creating a plasma of ions and free electrons. Further collisions in this pl...

Star Birth in Far-Off Galaxies When you look at the sky, all the natural light you see ultimately comes from stars. Earth and everything on it owe their existence to previous generations...

The Sun, Up Close The “Dynamic Sun” exhibit at the Air & Space Museum is built from six 50-inch video monitors, making a total display 6 feet tall by 7 feet wide. This gives a grande...