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Gemini Observatory

The Gemini Observatory consists of twin 8-meter optical/infrared  telescopes located on two of the best sites on our planet for observing  the universe.  Together these telescopes can access the entire sky.

The Gemini South telescope is located at almost 9,000’ elevation on a  mountain in the Chilean Andes called Cerro Pachón. Cerro Pachón shares resources with the adjacent SOAR Telescope and the nearby telescopes of the Cerro Tololo Inter-American Observatory. The  Frederick C. Gillett Gemini North Telescope is located on Hawaii's Mauna Kea as part of the international community of observatories that have been built to take advantage of the superb atmospheric conditions on this long dormant volcano that rises almost 14,000' into the dry, stable air of the Pacific. The Gemini Observatory’s international headquarters is located in Hilo, Hawaii at the University of Hawaii at Hilo’s University Park.

Both of the Gemini telescopes have been designed to take advantage of
the latest technology and thermal controls to excel in a wide variety of optical and infrared capabilities. One example of this is the unique Gemini coating chamber that uses "sputtering" technology to apply protected silver coatings on the Gemini mirrors to provide unprecedented infrared performance.

Gemini’s aggressive instrument program keeps the observatory at the cutting edge of astronomical research.  By incorporating technologies such as laser guide stars, Multi-Conjugate Adaptive Optics and multi-object spectroscopy, astronomers in the Gemini partnership have access to the latest tools for exploring the universe.  For the latest information of Gemini’s future instrumentation see: Scientific Horizons at the Gemini Observatory.

Gemini was built and is operated by a partnership of 7 countries including the United States, United Kingdom, Canada, Chile, Australia, Brazil and Argentina. Any astronomer in each partner country can apply for time on Gemini with is allocated in accordance with the amount of financial support provided by each country.

The Gemini telescopes have been integrated with modern networking technologies to allow remote operations from control rooms at the base
facilities in Hilo and La Serena Chile. With the flexibility of “Queue Scheduling” and remote participation, researchers anywhere in the Gemini partnership will be assured the best possible match between observation, instrument and observing conditions.

For more information visit the Gemini Observatory website.

Snowy Mauna Kea Pan


Gemini on summit Ridge  Sunset Approaches  The Perfect Spiral Galaxy  View of the Gemini telescope dome on Mauna Kea-SPL2  Jupiter in Near Infrared

Image Credit:
Snowy Mauna Kea Plan - Gemini Observatory
Gemini on Summit Ridge - Gemini Observatory by Richard Wainscoat IFA
Sunset Approaches - Gemini Observatory
The Perfect Spiral - Gemini Observatory Image / GMOS Commissioning Team
View of the Gemini telescope dome on Muan Kea-SPL2 - Magrath Photography, Science Photo Library
Jupiter in Near-Infrared - Gemini Observatory

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