CfA, via the Smithsonian Astrophysical Observatory, recently played a major role in the Lynx X-ray Observatory, a NASA-funded large mission concept study commissioned as part of the 2020 Astronomy and Astrophysics Decadal Survey ("Astro2020"). If launched, Lynx would be the most powerful X-ray observatory constructed to date, enabling order-of-magnitude advances in capability over Chandra. SAO is one of the 13 stakeholder institutes for the Event Horizon Telescope Board, and the CfA hosts its Array Operations Center. In 2019, the project revealed the first direct image of a black hole. The result is widely regarded as a triumph not only of observational astronomy, but of its intersection with theoretical astrophysics. Union of the observational and theoretical subfields of astrophysics has been a major focus of the CfA since its founding. In 2018, the CfA rebranded, changing its official name to the "Center for Astrophysics | Harvard & Smithsonian" in an effort to reflect its unique status as a joint collaboration between Harvard University and the Smithsonian Institution. Today, the CfA receives roughly 70% of its funding from NASA, 22% from Smithsonian federal funds, and 4% from the National Science Foundation. The remaining 4% comes from contributors including the United States Department of Energy, the Annenberg Foundation, as well as other gifts and endowments. Organizational structure Research across the CfA is organized into six divisions and seven research centers: Scientific divisions within the CfA Atomic and Molecular Physics (AMP) High Energy Astrophysics (HEA) Optical and Infrared Astronomy (OIR) Radio and Geoastronomy (RG) Solar, Stellar, and Planetary Sciences (SSP) Theoretical Astrophysics (TA) Centers hosted at the CfA Chandra X-ray Center (CXC), the science operations center for NASA's Chandra X-ray Observatory Institute for Theory and Computation (ITC) Institute for Theoretical Atomic, Molecular, and Optical Physics (ITAMP) Center for Parallel Astrophysical Computing (CPAC) Minor Planet Center (MPC) Telescope Data Center (TDC) Radio Telescope Data Center (RTDC) Solar & Stellar X-ray Group (SSXG) The CfA is also host to the Harvard University Department of Astronomy, large central engineering and computation facilities, the Science Education Department, the John G. Wolbach Library, the world's largest database of astronomy and physics papers (ADS), and the world's largest collection of astronomical photographic plates. Observatories operated with CfA participation Ground-based observatories Fred Lawrence Whipple Observatory Magellan telescopes MMT Observatory Event Horizon Telescope South Pole Telescope Submillimeter Array 1.2-Meter Millimeter-Wave Telescope Very Energetic Radiation Imaging Telescope Array System (VERITAS) Space-based observatories and