Big picture, big data: Swiss unveil VR software of universe
The final frontier has rarely seemed closer than this—at least virtually.
Researchers at one of Switzerland's top universities are releasing open-source beta software on Tuesday that allows for virtual visits through the cosmos including up to the International Space Station, past the Moon, Saturn or exoplanets, over galaxies and well beyond.
The program—called Virtual Reality Universe Project, or VIRUP—pulls together what the researchers call the largest data set of the universe to create three-dimensional, panoramic visualizations of space.
Software engineers, astrophysicists and experimental museology experts at the Ecole Polytechnique Federale de Lausanne, or EPFL, have come together to concoct the virtual map that can be viewed through individual VR gear, immersion systems like panoramic cinema with 3D glasses, planetarium-like dome screens, or just on a PC for two-dimensional viewing.
"The novelty of this project was putting all the data set available into one framework, when you can see the universe at different scales—nearby us, around the Earth, around the solar system, at the Milky Way level, to see through the universe and time up to the beginning—what we call the Big Bang," said Jean-Paul Kneib, director of EPFL's astrophysics lab.
Think a sort of Google Earth—but for the universe. Computer algorithms churn up terabytes of data and produce images that can appear as close as one meter (about three feet), or almost infinitely far away—as if you sit back and look at the entire observable universe.
VIRUP is accessible to everyone for free—though it does require at least a computer and is best visualized with VR equipment or 3D capabilities. It aims to draw in a broad array of visitors, both scientists looking to visualize the data they continue to collect and a broad public seeking to explore the heavens virtually.
Still a work in progress, for now, the beta version can't be run on a Mac computer. Downloading the software and content might seem onerous for the least-skilled computer users, and space—on a computer—will count. The broader-public version of the content is a reduced-size version that can be quantified in gigabytes, a sort of best-of highlights. Astronomy buffs with more PC memory might choose to download more.
The project assembles information from eight databases that count at least 4,500 known exoplanets, tens of millions of galaxies, hundreds of millions of space objects in all, and more than 1.5 billion light sources from the Milky Way alone. But when it comes to potential data, the sky is literally the limit: Future databases could include asteroids in our solar system or objects like nebulae and pulsars farther into the galaxy.
To be sure, VR games and representations already exist: Cosmos-gazing apps on tablets allow for mapping of the night sky, with zoom-in close-ups of heavenly bodies; software like SpaceEngine from Russia offers universe visuals; NASA has done some smaller VR scopes of space.
But the EPFL team says VIRUP goes much farther and wider: Data pulled from sources like the Sloan Digital Sky Survey in the United States, and European Space Agency's Gaia mission to map the Milky Way and its Planck mission to observe the first light of the universe, all brought together in a one-stop-shop for the most extensive data sets yet around.
And there's more to come: when the 14-country telescope project known as the Square Kilometer Array starts pulling down information, the data could be counted in the petabytes—that's 1,000 terabytes or 1 million gigabytes.
Strap on the VR goggles, and it's a trippy feeling seeing the Moon—seemingly the size of a giant beach ball and floating close enough to hold—as the horizon rotates from the sunny side to the dark side of the lunar surface.
Then speed out to beyond the solar system and swing by Saturn, then up above the Milky Way, swirling and flashing and heaving—with exoplanets highlighted in red. And much farther out still, imagine floating through small dots of light that represent galaxies as if the viewer is an unconscionably large giant floating in space.
"That is a very efficient way of visiting all the different scales that compose our universe, and that is completely unique," says Yves Revaz, an EPFL astrophysicist. "A very important part of this project is that it's a first step toward treating much larger data sets which are coming."
Entire galaxies seem to be strung together by strands or filaments of light, almost like representation of neural connections, that link up clusters of light like galaxies. For one of the biggest pictures of all, there's a colorful visualization of the Cosmic Microwave Background—the radiation left behind from the Big Bang.
"We actually started this project because I was working on a three-dimensional mapping project of the universe and was always a little frustrated with the 2D visualization on my screen, which wasn't very meaningful," said Kneib, in a nondescript lab building that houses a panoramic screen, a half-dome cinema with bean-bag seating, and a hard-floor space for virtual-reality excursions.
"It's true that by showing the universe in 3D, by showing these filaments, by showing these clusters of galaxies which are large concentrations of matter, you really realize what the universe is," he added.
This story reflects the fact that EPFL has corrected its initial press release to say "terabytes" rather than "tens of terabytes."
More information: Press release
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