Welcome to the MMT Observatory


Latest News

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  • Dec. 3-4: Roadwork on Mt. Hopkins

    Culvert replacement will be conducted around km 7 on December 3 & 4, resulting in an overnight closure of the road at that area. The road will close at 8:30am on Dec. 3 and reopen after 4:00pm on Dec. 4. A walk-through will be in place with vehicles available on either side for use by observers and staff.  Current plans are for restrictions to be in place on Dec. 5, with road openings at 8-8:30am, noon-12:30, and after 4:00pm. Check back here for updates.

  • Local County is Proactive about Lighting

    Cochise County, Arizona, has recently updated its lighting codes with the latest lighting technology in mind. The result is more protection for observatories and astronomy, while allowing enough light for the needs of businesses. Read about the county leading the way in the state!