The U.S. National Science Foundation (NSF) is offering a federal grant opportunity titled "Aeronomy," aimed at supporting research related to the mesosphere, thermosphere, and Earth's ionosphere. This program focuses on understanding various phenomena such as ionization, chemical reactions, and energy transport, while also exploring the interactions between the ionosphere and the stratosphere and magnetosphere. The Aeronomy Program is crucial for advancing knowledge in atmospheric sciences and is aligned with the goals of the NAS Decadal Survey on Solar and Space Physics. Proposals are accepted on a rolling basis, with no cost-sharing requirements, and interested applicants can find more information and contact support at grantsgovsupport@nsf.gov or visit the NSF website for additional details.