NASA's ROSES 2025: A.17 Hydrosphere invites research proposals on hydrosphere topics, requiring a Step-1 proposal by Oct 8, 2026 and Step-2 by Jan 28, 2027, with dual anonymous peer review.
NASA’s ROSES 2025 C.2 Solar System Science program accepts proposals on solar system research any time until 3/31/2026, with details and requirements available in the full program solicitation.
NASA seeks Heliophysics Spaceflight Science Foundations proposals, with required Step-1 proposals due November 20, 2026, and Step-2 proposals due February 5, 2027.
NASA's 2025 Geosphere research opportunity requires mandatory Notices of Intent through NSPIRES by November 16, 2026; program-specific requirements are in the full solicitation.
NASA’s ROSES-2025 A.15 Biosphere program invites two-step research proposals on biosphere topics, with Step-1 due Sept 4, 2026 and Step-2 due Nov 6, 2026, requiring research security training for key personnel.