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

March 14, 2019

After achieving highly successful results with their citizen science project, Muon Hunters, in 2017, scientists from the VERITAS are once again asking the public for help in identifying hundreds of thousands of ring patterns produced in the cameras at VERITAS.

March 5, 2019

An international team of astronomers, led by University of Hawai'i graduate student Ashley Chontos, announced the confirmation of the first exoplanet candidate identified by NASA's Kepler Mission. The result was presented today at the fifth Kepler/K2 Science Conference held in Glendale, CA.

Latest Science Update

March 22, 2019

The sparsely distributed hot gas that exists in the space between galaxies, the intergalactic medium, is ionized. The question is, how? Astronomers know that once the early universe expanded and cooled enough, hydrogen (its main constituent) recombined into neutral atoms.

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