NASA offers up to $13 million over five years for teams of at least three U.S. universities to advance rotating detonation rocket engine design; mandatory preliminary proposals are due November 3, 2026.
NASA’s Phase I program supports nine-month studies of visionary concepts; U.S. organizations may apply through a two-step proposal process, with the solicitation expected around September 28, 2026.
NASA's Heliophysics Low-Cost Access to Space program seeks suborbital research payload proposals, with Step-1 due November 20, 2026, and required before Step-2, due March 16, 2027.
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 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.