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ROSES-25 Amendment 68: New Opportunity: D.8 Habitable Worlds Observatory Precursor Science Investigations

30 July 2026

The Habitable Worlds Observatory (HWO) is a large-aperture ultraviolet/visible/near-infrared observatory concept recommended by the National Academies of Science, Engineering, and Medicine decadal survey, “Pathways to Discovery in Astronomy and Astrophysics for the 2020s” (Astro2020). The HWO mission concept would be the first space mission designed specifically to search for life outside our solar system and would be capable of performing transformative science across astrophysics, areas of planetary science, and more. Habitable Worlds Observatory Precursor Science Investigations (HWO-PSI) program element D.8 of ROSES aims to advance the scientific foundation that would reduce risk for a potential future HWO mission.

ROSES-2025 Amendment 68 releases D.8 Habitable Worlds Observatory Precursor Science Investigations (HWO-PSI) as a new opportunity in ROSES-25. Mandatory NOIs are due by September 10, 2026, and proposals are due by October 26, 2026. Proposals submitted to this program will be evaluated using dual anonymous peer review.

On or about July 27, 2026, this Amendment to the NASA Research Announcement "Research Opportunities in Space and Earth Sciences (ROSES) 2025" (NNH25ZDA001N) will be posted on the NASA research opportunity homepage at https://solicitation.nasaprs.com/ROSES2025and will appear on SARA's ROSES blog at: https://science.nasa.gov/researchers/solicitations/roses-2025/

Questions concerning D.8 HWO-PSI may be directed to Megan Ansdell at Megan.C.Ansdell@nasa.gov.  

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Angled from the upper left corner to the lower right corner is a cone-shaped orange-red cloud known as Herbig-Haro 49/50. This feature takes up about three-fourths of the length of this angle. The upper left end of this feature has a translucent, rounded end. The conical feature widens slightly from the rounded end at the upper right down to the lower right. Along the cone there are additional rounded edges, like edges of a wave, and intricate foamy-like details, as well as a clearer view of the black background of space. In the upper left, overlapping with the rounded end of Herbig-Haro 49/50, is a background spiral galaxy with a concentrated blue center that fades outward to blend with red spiral arms. The background of space is speckled with some white stars and smaller, more numerous, fainter white galaxies throughout.