NASA Headquarters is offering a federal grant opportunity titled "ROSES 2025: B.4 Heliophysics Guest Investigators - Open," aimed at supporting research in heliophysics. Proposers must be affiliated with a U.S. institution, as NASA primarily funds domestic organizations, although some provisions exist for non-U.S. entities under specific guidelines. This grant is part of NASA's broader Research Opportunities in Space and Earth Sciences (ROSES) initiative, which encompasses various research and technology projects, with awards typically structured as grants. Interested applicants should note that the Step-1 proposal is due by May 22, 2025, and the Step-2 submission deadline is July 31, 2025; for further inquiries, they can contact Galen Fowler at hq-hpd-hgio@mail.nasa.gov.