Gemini 2025B observing programs and schedule have been announced!
Notification emails were sent to successful PIs on June 16, 2025B. Please check the schedules page for more information.
Note that the latest version of the Observing Tool is required to access and update 2025B programs.
The 2025B Gemini Observatory Call for Proposals has been released. Proposals are being accepted for observations from 1 August, 2025 to 31 January, 2026. Gemini North and Gemini South are expected to have 128 and 159 nights available for science, respectively. A new version of the Phase I Tool (PIT) has been released to support proposal submissions.
Gemini 2025A observing programs and schedule have been announced!
Notification emails were sent to successful PIs on December 13, 2025. Please check the schedules page for more information.
Note that the latest version of the Observing Tool is required to access and update 2025A programs.
The Gemini Observatory Archive (archive.gemini.edu) will be down for upgrades on Wednesday 18-September from 08:00 HST until approximately 12:00 HST. These upgrades include additional server resources, and software improvements to facilitate improved support of reduced data in the archive along with many operational, reliability and sustainability improvements. During the upgrade, the archive website will be unavailable.
The 2025A Gemini Observatory Call for Proposals has been released. Proposals are being accepted for observations from 1 February, 2025 to 31 July, 2025. Gemini North and Gemini South are expected to have 165 and 155 nights available for science, respectively. A new version of the Phase I Tool (PIT) has been released to support proposal submissions.
Gemini 2024B observing programs and schedule have been announced!
Notification emails were sent to successful PIs on Jun 13, 2024. Please check the schedules page for more information.
Note that the latest version of the Observing Tool is required to access and update 2024B programs.
Image: International Gemini Observatory/NOIRLab/NSF/AURA/ M. Rodriguez, T.A. Rector, J. Miller, M. Zamani & D. de Martin
We strongly advise Mac users running on Apple silicon systems to refrain from updating their operating system to Sonoma 14.4 until further notice.
Updating to this version may result in disruptions to the functionality of our Observing Tool (OT), Phase I Tool (PIT), and other Java based tools.
The 2024B Gemini Observatory Call for Proposals has been released. Proposals are being accepted for observations from 1 August, 2024 to 31 January, 2025. Gemini North and Gemini South are expected to have 153 and 157 nights available for science, respectively. A new version of the Phase I Tool (PIT) has been released to support proposal submissions.
While Gemini is once again observing after the Cyber Incident, there are some operational issues which we are still working out. We are writing to inform you of the operational limitations we are working under while work continues.
In particular, some of the usual tools for communicating program status are currently unavailable or not fully functional, and we are actively working to minimize the impact on users.