Stephanion Observatory Planet Trail
STEPHANION OBSERVATORY
Take a Walk through Space!
The Planet Trail of Stephanion Observatory is an outdoor educational walk that brings the Solar System down to a human scale. Stretching approximately 590 meters, the trail represents the distances between the planets in correct proportion, allowing visitors to experience just how vast our Solar System truly is.
The trail starts at the Sun and continues past all the planets of our Solar System. At each stop, you’ll discover fun and interesting facts about every planet. As you walk from one planet to the next, you’ll notice the distances getting bigger and bigger — showing just how huge space is and why space exploration is such a remarkable challenge!
As you travel through space, take a moment to look around — the Planet Trail offers sweeping views of the western and southern mountain ranges of the Peloponnese, reminding us how amazing our own planet is too!
The Planet Trail is suitable for visitors of all ages—from school groups and families to curious explorers. It combines movement, learning, and discovery, offering a unique way to understand our place in the cosmos. So put on your walking shoes and get ready for an adventure through our amazing Solar System!
PLANET TRAIL
How it works
To begin the “Planet Walk”, start at the sign representing the Sun, located at the main gate of the Observatory. Walk westwards, meeting 8 signs that represent each of the planets in our solar system along the way. Each sign is placed at a distance from the Planet Trail Sun proportional to the actual distance between the Sun and that particular planet’s orbit.
The Planet Trail helps us understand the order and scale of our solar system: With every step you take, you will cross millions of kilometres of empty space!
After 590 metres, the trail ends at the chapel of Aghios Giorgios, where you reach the sign of the Kuiper Belt — the distant edge of our solar system.
The Planet Trail is open to everyone and can be enjoyed at any time, regardless of the Observatory’s opening hours.
Do planets ever line up?
From time to time, several planets gather on the same side of the Sun, forming what astronomers call a planetary alignment. When this happens, the planets can appear close together in the sky as seen from Earth, especially along the same general line called the ecliptic. These events can make for beautiful sky views, but the planets are still separated by vast distances in space.
A perfect straight-line alignment of all the planets is extremely unlikely and has never been observed. Because each planet travels at a different speed and along its own orbit, they are almost never evenly spaced or neatly lined up as they are on the Planet Trail.