Welcome to the MMT Observatory

Latest News

  • Click here for more MMTO news and highlights
  • MMT Observing Schedule: January - April

    The observing schedule for January - April 2019 can be found here.

  • UPDATE Km 18.5 Road Stabilization Project

    Phase II of the road stabilization project is underway with major interruptions. Heavy machinery is being used while they repair and pour concrete on the road. All vehicular traffic is unable to cross until further notice. Coordination with staff is required prior to going up the mountain. If you are an observer, please contact Susan Wahl to arrange transportation or make special arrangements during the road construction.

  • Smithsonian Lecture Series on Astronomy - 2019

    Join us for the 49th year of this lecture series held on Wednesday mornings at the Green Valley Recreation Center at 9:00AM. Each lecture is 45 minutes, followed by a question-and-answer period. All lectures are free and open to the public. Click here for the dates and the list of speakers and their topics. We hope to see you there!

  • Aging a Flock of Stars in the Wild Duck Cluster

    Do star clusters harbor many generations of stars or just one? Scientists have long searched for an answer and, thanks to the MMT and its Hectochelle instrument, found one in the Wild Duck Cluster, where stars spin at different speeds, disguising their common age. The UA news story can be read here.