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Dark matter can’t be seen, so this gallery is making it sing

Dark matter may have physicists stumped, but Science Gallery London has found clever ways to explore the elusive matter filling our universe
cartoon
Defying gravity: Andy Holden’s immersive cartoon environments
Andy Holden


Science Gallery London
To 26 August

IT’S a discombobulating 11 minutes in a lock-up garage in a hip part of east London. The pulsating soundscape issuing from 10 speakers encircling me is by turns oddly menacing and strangely thrilling, ebbing and flowing with low throbs and high harmonics.

It is kind of cosmic – appropriately enough, since this is what dark matter sounds like. Or at least it is what dark matter might sound like if we had the faintest idea what it looked like, which we don’t really. The nature of this matter, which prevailing ideas of gravity suggest makes up over 80 per cent of all the stuff in the universe, remains fundamentally opaque.

The installation, the brainchild of sound artist for a new exhibition at the Science Gallery London, is based on visual simulations of dark matter swirling around a galaxy created by David Marsh, a theoretical physicist at the University of Göttingen, Germany, and his collaborator Dave Ronan of AI Music.

The information representing the speed of simulated “axionic” dark matter is usually rendered as pixels on a screen. But why make visual something so clearly unenvisagable? Instead, Satz took the data from 10 points in a circle a few kiloparsecs in diameter in the simulated galaxy to feed her speakers, carefully calibrating frequencies to create the kind of psychoacoustic effects guaranteed to mess with our minds. “You enter and feel you’re part of an energetic, dynamic flow,” says Satz. “It’s unsettling.”

In some senses, then, it is a sonic diagram of dark matter – but in the way the constant flow of sound never quite resolves into anything, it is also a metaphor for the frustrating hunt for the stuff. “It’s like we’re looking for a radio station, but don’t know what it is, but we’ll know it when we hear it,” says Satz.

For , a theoretical physicist at King’s College London who also collaborated on the project, it is quite an ear-opener. “Something that’s very mathematical, normally on a small screen, can be interacted with as sound,” he says. “It gives a completely new way to interact with the data.”

Satz’s installation is one of 15 works by 13 artists in the Science Gallery exhibition that aim to interrogate the mystery of dark matter in different ways. They include photography by Enrico Sacchetti, often featured on èƵ‘s pages, of XENON1T – the world’s largest dark-matter detector, which was constructed under Italy’s Gran Sasso mountain. Then there is work by Argentinian artist Tomás Saraceno, who visualises dark matter’s cosmic web using (you’ve got it) spiders’ webs, and Andy Holden’s immersive cartoon environment that defies the normal laws of gravity.

That last work represents a different way out of the dark-matter conundrum: that the stuff simply doesn’t exist, and it is our conception of physical laws that is at fault.

“Theoretical physicists are essentially reaching limits not just of knowledge, but of metaphor in trying to articulate what we hope to understand,” says , the gallery’s head of programming. “If we’re spending phenomenal amounts of [public] money creating science experiments, it’s important people get the chance to consider their own relationship to it in as many ways as possible.”

Sounds about right.

Article amended on 12 June 2019

We corrected the attribution of the people who produced the dark matter simulations

Topics: Dark matter / Exhibition