A scale model of the entire solar system is being installed along the River Foyle in Derry.
It is a collaboration of art and astrophysics intended to make people consider their place in the cosmos.
The 10km sculpture trail, laid out along both banks of the River Foyle, will be open to the public tomorrow.
It is the brainchild of Co Down-born artist, author and illustrator Oliver Jeffers.
"Even past the moon, you can't see anything by man," he said.
"You don't see borders, you don't see any of the accomplishments of humanity.
"So perhaps we can add some perspective to the way in which we see ourselves and how we conduct ourselves on the only bit of dry land that's habitable to human life in the known universe."
He collaborated with Queen's University astrophysicist Professor Stephen Smartt to ensure the distances between the planets and the planets themselves were sized to scale.
The trail and the planets are a 591 million to one scale model of the full solar system.
The largest model, of the Sun, is 2.35m in diameter. The Earth is only 2.2cm across.
"The concept is that people come and get an actual feel for the size of our solar system," Professor Smartt said.
"That the Earth really is tiny in comparison to our solar system. And our solar system is just one tiny bit of our galaxy."
The installation will stay in Derry for a while before moving on to other venues in Northern Ireland, including Divis Mountain above Belfast and the north Down coastal route.
