It's being called Europe's Extremely Large Telescope and right now it's mostly a set of scale drawings - but in less than a decade it'll be a reality that scientists from St Asaph are helping to perfect.
In Glyndwr University's laboratories, they're grinding out one of the most vital parts of the telescope - the optics that make up its lens - a massive task for what's one of the world's largest building projects.
Rob Shelley reports.
Each panel costs a quarter of a million pounds.
Right now they're making seven as a test - but hoping to turn a project into effectively a production line creating over seven hundred lenses.
It will make a lattice of optics set to look further foward and back than any other telescope ever has.