24" Clark Refractor Telescope
Discover the universe with the same telescope that inspired Percival Lowell to search for life on Mars, revealed the expanding universe, and gave Apollo astronauts early views of the Moon.
Weather
Plan Your Visit
See what fun adventures await during your visit.
Experiences
Buy Tickets
General Admission
General Admission gives you all-day access to 127 years of astronomical discovery at Lowell Observatory.
Buy Tickets
Book a Tour
Premium Access
Designed for small groups of 10 individuals, these private personalized expeditions across the stars offer exclusive opportunities to view the cosmos.
Book a Tour
See the LDT
LDT Excursions
This exclusive guided experience is an unforgettable behind-the-scenes look at the 4.3 meter Lowell Discovery Telescope, the 5th-largest optical telescope in the continental United States.
Tickets include general admission to our Mars Hill campus in Flagstaff.
See the LDT
Book a Course
Astrophotography Course
Take the first step in your astrophotography journey with an intensive course at Lowell Observatory! At the end of the course, you’ll take home digital copies of the two images and all of the raw data to use as you like, as well as additional resources to aid you in your astrophotography journey!
Book a Course
Areas of Research
Our Look into the Solar System
Solar System
Planetary scientists continue a long tradition of studying bodies in the solar system, including the Sun, planets, moons, comets, meteors, asteroids, and Kuiper belt objects.
Our Look into the Solar System
How We Study the Stars
Stellar Astrophysics
Another longstanding tradition at Lowell is the study of stars, from supermassive Wolf-Rayet stars to low-mass M-dwarf varieties.
How We Study the Stars
What Else is Out There?
Exoplanetary Systems
Lowell astronomers search for distant worlds around other stars and characterize their nature.
What Else is Out There?
Learning About Our Neighbors
Galactic & Extragalactic Astronomy
V. M. Slipher’s observations of the redshifts of galaxies a century ago were the first evidence for the expansion of the universe. Research on structures of galaxies and of the universe continues at Lowell today.
Learning About Our Neighbors
The Tools of Astronomy
Instrumentation Research & Development
Our instrumentation team carries out a variety of work in support of research instrumentation, outreach telescopes, and historic preservation projects.
The Tools of Astronomy
Lowell Observatory is an independent, non-profit research institution founded in 1894 by mathematician and astronomer Percival Lowell. Today, our mission is to pursue the study of astronomy, conduct research, and bring astronomical education to the public.
Events
View All Events
September 25 @ 5:00 pm
Festival of Science: Climate Change and the Colorado River Compact’s Next 100 Years