NASA's Johnson Space Center is inviting proposals for the 2024 Human Exploration Research Opportunities (HERO), aimed at soliciting applied research to support NASA's Human Research Program (HRP). The research will focus on five key elements: Space Radiation, Human Health Countermeasures, Exploration Medical Capability, Human Factors and Behavioral Performance, and Research Operations and Integration, all essential for ensuring safe and productive human space exploration. Awards will range from under $100,000 for limited efforts to $1.2 million for extensive activities, with a performance period of one to five years. Interested applicants, including all categories of U.S. institutions, must submit proposals electronically by the first due date of November 1, 2023, and can contact Steven Platts, Ph.D., at JS-HRP-Chief-Science-Office@mail.NASA.gov for further inquiries.