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.

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.

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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.

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02/23/2026
11/23/2025

Join us tonight for the last public night of the season. Saturn and Neptune will make an appearance. We're open until 6:45 pm.

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11/21/2025

We are going to bump our final observing night of the season to Saturday, 11/22 at 5:45 - 6:45 pm due to weather.

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11/07/2025

It looks like the sky is going to clear up for observing tonight. We'll be at the observatory from 5:45 - 6:45 pm. Parking is available along the sidewalk in front of the building.

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10/17/2025

The observatory will be open tonight from 7:15 pm - 8:30 pm!

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Address

1251 Libbie Coy Way
Fort Collins, CO
80521

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