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Exploring the Universe, Sharing its Wonders

The International Gemini Observatory consists of twin 8.1-meter diameter optical/infrared telescopes located on two of the best observing sites on the planet. From their locations on Maunakea in Hawai‘i and Cerro Pachón in Chile, Gemini Observatory's telescopes can collectively access the entire sky.

The international Gemini Observatory is operated by NSF NOIRLab.

About Gemini

Operations Updates

July 3, 2025

Science Operations Announcements

Gemini proposal server inaccessible July 3
July 3, 2025

Fast Turnaround Call For Proposals

July 2025 Call for Proposals
July 1, 2025

Instrument Announcements

Switchover to new GMOS-N R400 on August 1 (HST)
July 1, 2025

Instrument Announcements

GMOS-N B480 unavailable from July 3 (HST) for ~3 weeks
More Operations Updates

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Access the Calls for Proposals
Semester Program: 2025B CfP Closed
Large and Long Program: 2025B LLP CfP Closed
Fast Turnaround: This month's CfP Open

Press Releases

International Gemini Observatory and SOAR Discover Surprising Link Between Fast X-ray Transients and the Explosive Death of Massive Stars

International Gemini Observatory and SOAR Discover Surprising Link Between Fast X-ray Transients and the Explosive Death of Massive Stars

July 7, 2025
Gemini South Observes Shape and Origin of Near-Earth Asteroid 2024 YR4

Gemini South Observes Shape and Origin of Near-Earth Asteroid 2024 YR4

April 8, 2025

Planetary System Found Around Nearest Single Star

Planetary System Found Around Nearest Single Star

March 11, 2025

Gemini South Observes Ultra-Hot Nova Erupting With Surprising Chemical Signature

Gemini South Observes Ultra-Hot Nova Erupting With Surprising Chemical Signature

March 5, 2025

A Fiery Rose Captured by Gemini South

A Fiery Rose Captured by Gemini South

February 14, 2025

More Press Releases

International Gemini Observatory

The International Gemini Observatory  provides the astronomical communities in six participant countries with state-of-the-art astronomical facilities that allocate observing time in proportion to each country's contribution. In addition to financial support, each country also contributes significant scientific and technical resources. The national research agencies that form the Gemini partnership include: the US National Science Foundation (NSF), the Canadian National Research Council (NRC), the Chilean Agencia Nacional de Investigación y Desarrollo (ANID), the Brazilian Ministério da Ciência, Tecnologia e Inovação, the Argentinean Ministerio de Ciencia, Tecnología e Innovación, and the Korea Astronomy and Space Institute (KASI). The observatory is managed by the Association of Universities for Research in Astronomy, Inc. (AURA) under a cooperative agreement with the NSF. The NSF also serves as the executive agency for the international partnership.     

Association of Universities for Research in Astronomy, Inc. (AURA) logo

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Observing

    • Start here!
    • Phase I: Proposing for Time
    • Phase II: Requesting & Monitoring Observations
    • Phase III: Retrieving & Reducing Data
    • Getting Help
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