CSU Astronomy at the Madison-Macdonald Observatory

CSU Astronomy at the Madison-Macdonald Observatory The Madison-Macdonald Observatory is located on Colorado State University (CSU) main campus.

We host regular public observing nights on the first and third Fridays of the month from April through November.

08/15/2026

Clouds will keep the observatory is closed August 14. Our next public night is scheduled for August 28 at 8:45 pm.

Send a message to learn more

07/10/2026

Join us at 9:30 pm tonight (July 10) for public observing!

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06/27/2026

The sky is quite cloudy still, so we will cancel the public night tonight. Join us at our next session on July 10 at 9:30 pm.

Send a message to learn more

06/12/2026

The observatory is open tonight (June 12) from 9:30 - 10:30 pm!

05/23/2026

It looks like the clouds rolled in, so the observatory will be closed tonight. Join us for our next public night on June 12 at 9:30 pm.

Send a message to learn more

05/08/2026

Join us for public observing Friday, May 8 from 9 pm - 10 pm!

Join CNS Little Shop of Physics for their summer kickoff celebration!
05/01/2026

Join CNS Little Shop of Physics for their summer kickoff celebration!

04/25/2026

Looks like we might be dodging some clouds tonight, but we plan to open for public observing at 8:45 pm.

Send a message to learn more

02/23/2026

Address

1251 Libbie Coy Way
Fort Collins, CO
80521

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