Current Call for Proposals
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The National Radio Astronomy Observatory/Green Bank Observatory (NRAO/GBO) Call for Proposals for the Semester 2025B will close on Wednesday, 29 January at 22:00 UTC (5:00 P.M. ET).
The Semester 2025B Proposal Call information can be viewed here.
Additional Information
Useful Resources
Previous Calls for Proposals
In the posts below you will find information on previous proposal calls (in reverse-chronological order) including for each semester the proposal call results and a list of the science program.