The U.S. National Science Foundation (NSF) Announces Decision to Close Sunspot Solar Observatory
In the article here, NSF has announced the closure of the Sunspot Solar Observatory. It will remain closed to the public indefinitely.
Following the January 5, 2026 discovery of liquid mercury on the platform inside the Dunn Solar Telescope, and the subsequent indentification of a leak originating from the main bearing, the U.S. National Science Foundation has determined that the most prudent course of action is to completely drain and remove the mercury from the site as soon as possible. This action, while necessary for safety and environmental reasons, will render the DST inoperable. At this time, and through the remediation of the DST, the visitor's center will remain closed to the public for safety purposes.
In order to ensure the safety of all workers, personnel and the public, Sunspot Observatory (including the Dunn Solar Telescope, the Visitor Center, the surrounding areas, and local hiking trails) is CLOSED TO THE PUBLIC for the foreseeable future. We apologize for any inconvenience.
On the morning of January 5th, two NMSU staff members inside the Dunn Solar Telescope (DST) observed liquid mercury on the platform. Proper safety protocols were implemented immediately to ensure the safety of both on-site personnel. The DST, the surrounding observatory building, and visitor center will remain closed until further notice while appropriate remediation measures are implemented. There is no immediate concern for public or environmental safety, and the proper authorities have been notified.
Youth Organization Field Trip
Plan A Field Trip to Sunspot Solar Observatory
Sunspot Solar Observatory offers a one-of-a-kind educational experience for youth organizations from Pre-K through 12th grade. Our guided field trips bring solar science to life through hands-on learning, historic exploration, and real-world connections to astronomy.
Field Trip Registration Policy
To ensure proper scheduling and availability, please register for your field trip at least three weeks in advance. Requests made with less notice will not be guaranteed.
Note: To reserve a private telescope tour for your group, there is a minimum requirement of 12 people. If there you have less than 12 people (counting the chaperone), then you will need to plan on attending a tour during our public tour hours.
General Admission
Cost: $3.00 per person (youth & adults)
Admission Includes:
- Access to the museum and observatory grounds
- A guided tour of the Dunn Solar Telescope where students will discover what our telescope observes on the Sun, explore how the telescope works and what makes it so unique, and learn what scientists have uncovered about solar activity over the decades.
Chaperone Policy
All youth groups must be supervised by adult chaperones. We require at least one adult for every 10 kids.
Chaperones must stay with their kids at all times.
Weather & Walking Considerations
Sunspot Solar Observatory is located at an elevation of 9,200 feet, where weather conditions can change rapidly and may include strong sun, wind, rain, or snow – even in summer.
Please plan accordingly:
- Dress in layers and check the forecast before your trip
- Bring sun protection, including hats and sunscreen
- Wear comfortable, closed-toe shoes suitable for walking and standing
The paved walking path around the observatory is approximately 0.5 miles with slight inclines. Prepare for moderate walking throughout your visit.
Food & Beverages
There is no food or beverage options on-site. Please bring adequate food and drinks for your group. We recommend packing lunches and water bottles for each participant. Picnic areas are available.
Cancellation Policy
If you must cancel your reserved program, please notify us at least 48 hours in advance of your scheduled visit.
Reserve Your Field Trip Today!
Contact: Liz Fernandez
Phone: +1 (575) 434-7190
Email: emjones@nmsu.edu
We look forward to welcoming your group for a memorable and inspiring day at Sunspot Solar Observatory!