An Inflatable Planetarium Where You Can Climb Into The Night Sky 

An Inflatable Planetarium Where You Can Climb Into The Night Sky 

If you were one of the millions of people driving over London’s perpetually congested A13 highway in late November, you probably wouldn’t have noticed it: Below the underpass, an eerily glowing orb surrounded by crowds of people who seemed to be crawling in and out of it.

London’s annual “light night”, called Light Night Canning Town, brings together artists and makers to build light-focused installation art, much of it beneath the busy A13. The event’s second year took place this (northern) winter, and included this wonderfully cool project by the London design studio Loop.pH. It’s called Osmo, and it’s a pneumatically-inflated cocoon made from silver mylar — the same stuff used as insulation on everything from emergency blankets to spacecraft.

Inflated below the A13, visitors could crawl into Osmo thanks to a zip-up entrance, then sit beneath the stars — which were projected onto the 9m high surface using lasers. Is it accurate? Loop.pH’s Mathias Gmachl told me that the projections are actually based on the actual night sky. The design team used this map from In the Sky, which charts 88 constellations “plotted on a rectangular grid right ascension — celestial longitude — and declination — celestial latitude,” according to the site.

That means they had to project the 2D rectangular map onto a roughly spherical object, which they did using the 3D modelling program Rhino and the parametric design program Grasshopper. This was what the final model ended up looking like:

So, obviously, it’s not a perfectly realistic depiction of how we see the night sky — it’s as though you’re the Earth itself, able to look up, down, or any other direction unencumbered by the horizon or seasons or any other factors. The flat ground would have created plenty of deformation, too.

So an exact science, it ain’t — and for an installation designed to delight people, that’s just fine. named the project Osmo, but they gave it a subtitle too: A beginners guide to constructing the cosmos. That’s an even more accurate way to describe it — a crumpled-up blueprint of our galaxy, unfolding and deforming all around us.

Pictures: Loop.pH