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

November 12, 2019

Scientific data taken by the Parker Solar Probe are set to be released to the public on Nov 12. The data files being released contain measurements that were taken closer to the Sun than ever before. These unprecedented data promise to revolutionize our understanding of how the solar corona and solar wind work.

October 30, 2019

GMTO Corporation, the organization managing the development of the Giant Magellan Telescope (GMT) on behalf of its U.S. and international founders, has signed a contract with MT Mechatronics and Ingersoll Machine Tools to design, build and install the telescope's precision steel structure.

Latest Science Update

November 15, 2019

Paradoxically black holes, which emit no light because of their strong gravitational fields, are regularly discovered via the bright X-ray emission that arises when material accretes onto a torus around a black hole, heating the torus to high temperatures.

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