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Seven stone and bronze lines embedded in the lower West Observation Terrace radiate out from the building toward the western horizon. Each line points toward a notable sunset or moonset position on the horizon.

Unimaginably vast and continuously changing, the universe has been growing larger for nearly 14 billion years. We are connected to the origin of the universe by the sparkling ribbon of time that reaches from the Big Bang to today, when we observe what the universe is, understand what it is doing, and appreciate how long all of this has been going on.

The observatory owes its existence to the dream of one man, Griffith Jenkins Griffith, and to the dedicated scientists and public servants who worked to fulfill his vision of making astronomy and observation accessible to all.

It is not very often we can watch the phases of the Moon change in a few minutes, as they do here overhead. In the real world you notice the shape of the Moon changing over the course of a few weeks.

Earth is bombarded by a constant rain of debris from space. Most of it is fine dust that drifts down to the surface. Other pieces can be as small as a grain of sand or larger than a house.

In May 2020, even though closed, the Observatory celebrated its 85th anniversary with a social media campaign marking one decade of service each day.

Just off the Keck Central Rotunda, three lightboxes illustrate the wonder of human exploration of the Moon.

Ceremony including a public presentation and book signing by the Apollo 11 astronaut

Griffith Observatory broadcasts this public program live from the Leonard Nimoy Event Horizon Theater on the third Thursday of every month. Join the Observatory's curatorial staff as they examine and explain the most-talked-about subjects in astronomy and space science. It is free to attend in-person or stream on YouTube.

Are you looking for an astronomy group like the Observatory’s longtime partner, the Los Angeles Astronomical Society (LAAS)? What about other planetariums in southern California? We can help. There are also general references below for reputable amateur astronomy information.