Harvard University astronomers and Smithsonian Institution astronomers explore the cosmos together. The combination of the Harvard College Observatory (HCO) and the Smithsonian Astrophysical Observatory (SAO) is known as the Center for Astrophysics | Harvard & Smithsonian (CfA).

News Releases

April 8, 2020

Scientists at the Center for Astrophysics | Harvard & Smithsonian (CfA), in concert with the Event Horizon Telescope (EHT) Collaboration, have discovered something lurking in the heart of quasar 3C 279: a writhing relativistic jet.

April 3, 2020

Scientists at the Center for Astrophysics | Harvard & Smithsonian today announced the detection of J2322+0509, a detached binary white dwarf composed of two helium-core stars with a short orbital period. It is the first gravitational wave source of its kind ever detected.

Latest Science Update

April 3, 2020

TRAPPIST-1 is a system of seven Earth-sized worlds orbiting an ultra-cool dwarf star about forty light-years away. The IRAC camera on Spitzer was used to help discover these seven Earth-sized planets orbiting the star, at least three of them lying in the star's habitable zone

SI Specific Information

SI-specific information regarding the government shutdown may be found at alerts.si.edu. SAO staff are encouraged to review the website for updated information