International Observe the Moon Night is a time to come together with fellow Moon enthusiasts and curious people worldwide. Everyone on Earth is invited to learn about lunar science and exploration, take part in celestial observations, and honor cultural and personal connections to the Moon. Note that we encourage you to interpret “observe” broadly.

International Observe the Moon Night occurs annually in September or October, when the Moon is around first quarter ― a great phase for evening observing. Furthermore, a first-quarter Moon offers excellent viewing opportunities along the terminator (the line between night and day), where shadows enhance the Moon’s cratered landscape.

You can join International Observe the Moon Night from wherever you are. Attend or host a virtual or in-person event, or observe the Moon from home. Connect with fellow lunar enthusiasts around the world through our Facebook page, #ObserveTheMoon on your preferred social media platform, and join the International Observe the Moon Night Flickr group. Outdoors, at home, online, or wherever you may be, we’re glad to have you with us. However you choose to observe, please follow local guidelines on health and safety.

Goals of International Observe the Moon Night:

  1. Unite people across the globe in a celebration of lunar observation, science, and exploration.

  2. Provide information, a platform, and resources in order to:

    • Raise awareness of NASA’s lunar science and exploration programs.

    • Empower people to learn more about the Moon and space science and exploration, using Earth’s Moon as an accessible entry point.

    • Facilitate sharing of Moon-inspired stories, images, artwork, and more.

    • Inspire continued observation of the Moon, the sky, and the world around us.

More About International Observe the Moon Night

International Observe the Moon Night is sponsored by NASA’s Lunar Reconnaissance Orbiter mission and the Solar System Exploration Division at NASA’s Goddard Space Flight Center, with many contributors.

Plan Ahead

Upcoming dates for International Observe the Moon Night

  • September 26, 2020

  • October 16, 2021

  • October 1, 2022

Quick Links

Host an event (virtual or in-person)

Attend an event (virtual or in-person)

Register as an individual participant

Try this at home! (Further resources)


Main Image
Credit: Gibbs Memorial Library | Location: Texas, United States

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