Observatory closed for Friday and Saturday viewing

Reservations are available for private groups Sunday through
Thursday evening.  CDC protocols will be observed.

Send message via link below for information on private sessions.



SUNSET - 9:30 PM

(weather permitting)

Cancelled Until

Further Notice


Located at 2757 E Guadalupe Road in the Gilbert Riparian Preserve next to the Gilbert Library at Greenfield and Guadalupe.

Cost: Free (CLOSED)

Donations welcome. Suggested donation $5/family or $3/adult.

Public Hours

*weather permitting

Friday Evening:      Sunset - 9:30 PM

Saturday Evening:  Sunset - 9:30 PM


Cancelled Until

Further Notice

public star party

Every 2nd Friday: Sunset - 9:30 PM

Additional telescopes supplied by members of the East Valley Astronomy Club are available for free public viewing, plus an astronomy related talk in the adjoining public library at 7:30 PM.

Cancelled Until

Further Notice

private viewing

Available by reservation Sunday - Thursday, maximum 6 people.

Minimum of $40 donation. Organized youth groups working on astronomy awards may be eligible for fee waiver.


Now Available

Special events

From time to time the observatory is open for special events and solar viewing.

Find out more about special events on the calendar.


Observatory Etiquitte

We ask that viewers do not physically touch the telescope or eyepiece (it is tempting for viewers of all ages) because the telescope is always moving by computer control, and touching will cause the image to shake.


Please refrain from using flashlights or looking at your cellphones during your visit to the observatory. The best viewing is obtained when your eyes are “dark adapted”. We use red lights to assist your night vision, and looking at bright lights will instantly cause your eyes to react and lose the ability to more easily see fainter objects.


Flash photography is not allowed.


The observatory staff will choose objects that are available for viewing that evening. We will try to see several objects during an evening, but that is dependent on the number of people waiting in line.


Please feel free to stay and watch our educational videos on the patio as you wait.

Ask our volunteers any astronomy related question that is on your mind, but please be respectful of other guests who are waiting to view.

The Moon & Planets

Evening Planets

(after sunset)

  • Venus

  • Mars

  • Jupiter (midnight to dawn)

  • Saturn (midnight to dawn)

Morning Planets

(before sunrise)

  • Mercury


(before sunrise)

none currently visible


Perseids active July 17 to August 26

peak activity August 12 or 13

Phases of the Moon​

July 9

12:17 PM

First Quarter Moon
July 17

2:11 AM

July 23

7:37 PM

Last Quarter Moon
July 31

6:16 AM


Clear Sky Chart

Contact Us

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