The National Science Foundation (NSF) is offering a grant opportunity titled "Geospace Cluster," aimed at supporting fundamental and solutions-oriented research related to the Earth's near-space environment. This initiative encourages research on various topics, including aeronomy, magnetospheric physics, solar-terrestrial physics, and space weather, with a focus on understanding the Sun-Earth system and its societal impacts, such as space weather and upper atmosphere climate change. Proposals are accepted at any time, and interested applicants can find more information and submit proposals through the NSF's grants.gov support at grantsgovsupport@nsf.gov. For further details, including specific solicitations and requirements, please refer to the NSF Program Description PD-24-7789 available at http://www.nsf.gov/funding/pgm_summ.jsp?pims_id=506312.