What's Happening?
NASA has released an amendment to the Announcement of Opportunity (AO) for the 2026 Astrophysics Explorers Program, specifically for Small Explorer (SMEX) missions. This amendment, released by NASA's Science Mission Directorate, invites Principal Investigator-led
space science investigations. The proposal due date remains September 9, 2026. The amendment includes changes to the AO text, which are highlighted in bold and strikethrough formats. The updated AO and a summary of changes are available on the NASA Solicitation and Proposal Integrated Review and Evaluation System (NSPIRES).
Why It's Important?
The amendment to the SMEX program is crucial for advancing space science research and exploration. By inviting new proposals, NASA aims to foster innovative scientific investigations that can enhance our understanding of the universe. The SMEX missions are designed to be cost-effective and focused, allowing for targeted studies of specific astrophysical phenomena. This program supports the development of new technologies and methodologies, contributing to the broader goals of NASA's astrophysics research agenda.
What's Next?
Researchers interested in submitting proposals must adhere to the guidelines outlined in the amended AO. The Q&A period for the SMEX 2026 AO ends 14 days before the proposal due date. NASA will review the submitted proposals and select those that align with its scientific objectives and mission priorities. Successful proposals will proceed to the next stages of development, potentially leading to new discoveries and advancements in astrophysics.











