In 2019 the NASA-NSF Extremely Precise Radial Velocity (EPRV) Working Group developed a roadmap to discover and measure the masses of temperate terrestrial planets orbiting Sun-like stars. Such a program would provide targets for the Habitable Worlds Observer which aims to directly image 25 potentially habitable planets and in the 2040's. I will summarize the baseline plan for EPRV surveys and describe recent progress in our understanding of instrumental effects, software pipelines, and mitigating the effects of stellar variability on RV measurements. I will present Sun-as-Star observations, including those by the NEID Solar Telescope at WIYN Observatory, and describe how they can help us achieve these ambitious goals.

Speaker: Eric Ford (Pennsylvania State University)

The 2026 Spring Colloquium talks are held on Wednesdays at 3:00 PM. This colloquium is hosted by STScI and will be held as an in-person and virtual event.

You may join in person at STScI’s John N. Bahcall Auditorium or virtually on the STScI Research YouTube channel.

Please direct questions or comments to contact above. The 2026 Spring Colloquium members are: Nimisha Kumari (STScI), Elena Manjavacas (STScI), Jack Neustadt (JHU), Kevin Schlaufman (JHU), Adam Smercina (STScI), Ethan Vishniac (JHU).