ROSES25: D.8 Habitable Worlds Observatory Precursor Science Investigation

The National Aeronautics and Space Administration, through NASA Headquarters and its Science Mission Directorate, is offering ROSES25: D.8 Habitable Worlds Observatory Precursor Science Investigation under funding opportunity number NNH25ZDA001N-HWOPSI. Applying the title year rule for data entry removes the year token from the normalized title, but the solicitation itself is a program element of Research Opportunities in Space and Earth Sciences, or ROSES-2025. ROSES is NASA Science Mission Directorate's annual omnibus research announcement covering a broad range of basic and applied supporting research and technology. This opportunity is categorized as Science and Technology and other Research and Development under Assistance Listing 43.001, Science, and awards may use grants or cooperative agreements. This program element concerns Habitable Worlds Observatory precursor science investigation. The supplied Grants.gov synopsis directs proposers to the specific D.8 program element and the broader ROSES-2025 solicitation materials for the detailed scientific objectives, proposal requirements, and applicable rules. Because ROSES is an omnibus solicitation, individual program elements have their own subjects and deadlines and may differ from the default requirements in the ROSES Summary of Solicitation. The July 27, 2026 amendment introduced this new program element and specifically noted that its seven-page limit for the S/T/M Section and required proposal content differ in several ways from the ROSES-2025 defaults. A correction issued August 28, 2026 added the Open Science and Data Management Plan to Table D.8-1 in Section 3.4 without changing the due dates. The Grants.gov synopsis does not provide an award ceiling, award floor, estimated total program funding, or expected number of awards for this specific program element. The general ROSES information states that a typical award period of performance is three years, while some ROSES programs permit up to five years and others specify shorter periods, but it does not establish a specific performance period for D.8 in the supplied material. NASA states that cost sharing or matching is not required. Research security training is required beginning August 5, 2026. All principal investigators and any co-investigators who would spend at least 10 percent time on a proposed grant or cooperative agreement must certify completion of research security training. NASA identifies the National Science Foundation Research Security Training modules or the SECURE Center condensed version as acceptable training options. Eligibility is stated through additional eligibility information rather than a conventional Grants.gov applicant-type list. Proposers must be affiliated with an institution at NSPIRES, and NASA generally provides funding only to U.S. institutions. Organizations outside the United States may propose on a no-exchange-of-funds basis subject to the NASA Grant and Cooperative Agreement Manual. The broader ROSES synopsis states that, in most cases, organizations of every type, including government and private, for-profit and not-for-profit, domestic and foreign organizations subject to applicable caveats, may submit proposals without restrictions on teaming arrangements. Because the specific D.8 eligibility text uses the general institutional affiliation requirement rather than enumerating the standard organizational categories, applicants should consult the specific program element and NASA Grant and Cooperative Agreement Manual for the controlling eligibility details. A mandatory Notice of Intent is required and must be submitted through NSPIRES by September 10, 2026. Full proposals are due October 26, 2026. The source specifically describes the Notice of Intent as mandatory, making it a pre-application gating requirement for this entry. Proposers should use the individual D.8 program element documentation together with the ROSES-2025 Summary of Solicitation when preparing the proposal. The supplied synopsis also states that most ROSES program elements in 2025 are established for application through Grants.gov only if requested at least 30 days before the proposal due date. The specific program element contains proposal requirements that differ from ROSES defaults, including the seven-page S/T/M Section limit and the required Open Science and Data Management Plan. The opportunity was posted on Grants.gov on July 27, 2026 and was last updated August 28, 2026. The mandatory Notice of Intent is due September 10, 2026, the full proposal deadline is October 26, 2026, and the Grants.gov archive date is November 25, 2026. No award notification date is stated in the supplied material. Megan Ansdell of the Astrophysics Division, Science Mission Directorate, NASA Headquarters, is the named grantor contact and may be reached at Megan.C.Ansdell@nasa.gov. General ROSES questions may be directed to sara@nasa.gov. Although ROSES itself is described as an annual omnibus research announcement, the supplied source does not establish that this specific D.8 Habitable Worlds Observatory Precursor Science Investigation program element will recur annually, so recurrence is not inferred for this individual opportunity.

Submit the mandatory Notice of Intent through NSPIRES by September 10 2026. Read the individual D.8 program element rather than relying only on generic ROSES requirements because the seven-page S/T/M Section limit and required proposal content differ from ROSES defaults. Include the Open Science and Data Management Plan added by the August 28 correction. Ensure the PI and any Co-I spending at least 10 percent time on the proposed award complete and certify the required research security training.