Maine Solar System Model
US Route 1
Presque Isle to Houlton, ME
Drive the solar system to scale, forty miles of highway where the Sun stands in Presque Isle and tiny Pluto waits down in Houlton, a road trip through space itself.
The Maine Solar System Model is one of the largest scale models of the solar system in the world, stretching roughly forty miles along US Route 1 through Aroostook County. The Sun is represented by a large disk at the University of Maine at Presque Isle, and the planets follow at true scale distances down the highway, shrinking to small markers as you drive south.
The genius of the model is what it makes you feel. The inner planets come quickly, one after another, but then the road runs on for miles between the outer worlds, until distant Pluto sits far away in Houlton near the Canadian border. Driving it is a lesson in the sheer emptiness of space that no textbook can match.
What Guests Love
- Driving from planet to planet and feeling the true, staggering scale of space
- Spotting the roadside planet markers as a scavenger hunt across Aroostook County
- A free, self-guided attraction that turns a long rural drive into an adventure
- The realization of just how far apart, and how small, the outer planets really are
Worth Knowing
- The planets are spread over roughly 40 miles of Route 1, so it is a driving tour, not a walk
- Markers can be easy to miss; a model map or list of locations helps you find each one
- The Sun and inner planets cluster near Presque Isle, while the outer planets stretch far south
- Aroostook County is remote and services are spread out, so fuel up and plan the drive
Details
Presque Isle to Houlton, ME
Learn about Maine Solar System Model
How the model was built
The model was created in the early 2000s by the University of Maine at Presque Isle, with faculty, students, and community volunteers building and placing the planet markers along Route 1 at carefully calculated scale distances.
Everything is scaled by the same ratio, both the sizes of the planets and the distances between them, so the model holds together as a true miniature of the real solar system rather than a set of unrelated roadside signs.
It was conceived as an educational tool and a point of local pride, giving Aroostook County a genuinely world-class attraction spread across its highways and turning a routine drive into a hands-on astronomy lesson.
Driving the planets
The tour begins at the Sun on the Presque Isle campus and heads south. Mercury, Venus, Earth, and Mars arrive in quick succession, close enough together that the inner solar system feels almost crowded.
Then comes the great gap. After Mars, the road stretches on for miles before reaching Jupiter and Saturn, and the outer planets are separated by such distances that the drive drives home how thinly matter is spread across the real solar system.
Far to the south, near Houlton, sits Pluto, a tiny marker at the end of the model that rewards travelers who follow the whole thing through. Because some markers are small and set beside a busy highway, a map of their locations makes the hunt easier.
The County around it
Aroostook County, known simply as The County, is Maine's largest and northernmost county, a vast landscape of potato farms, forest, and small towns that feels a world apart from the tourist coast.
This is the homeland of the Wabanaki peoples, and the Mi'kmaq and Maliseet nations maintain communities in the region today, present and enduring in the far north.
The wide-open, sparsely settled country is part of what makes the solar system model work so well. There is room here for a forty-mile model of space, and the long quiet drives between planets suit the emptiness the model is trying to convey.
A model among the largest
Scale models of the solar system exist in many places, but few approach this one in size. By stretching across roughly forty miles of highway, the Maine model ranks among the largest true-scale solar system models anywhere, a distinction Aroostook County wears with quiet pride.
That scale is the whole point. Smaller models fit in a park or a hallway, but they cannot convey the real distances. Here, only a drive long enough to eat up an afternoon can show you how vast and empty the solar system truly is, which is why the model works best when you follow it all the way to Pluto.
Closest Boutels
The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.
Things to Do Near Presque Isle
University of Maine at Presque Isle
At the Sun marker
The campus that built the model, home to the Sun display and the Northern Maine Museum of Science with more space and science exhibits.
Houlton
About 40 miles, an hour drive
The historic county seat and border town at Pluto's end of the model, with a handsome brick downtown and a US-Canada border crossing.
Aroostook State Park
About 5 miles, a 12 minute drive
Maine's first state park, set on Echo Lake beneath Quaggy Jo Mountain, with hiking, paddling, and camping near Presque Isle.