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HGST's HDDs are the first and only helium-filled HDDs in the world. The hermetically sealed Ultrastar HDDs being used by the EHT result in higher capacity and lower power consumption when compared to air-filled HDDs. In addition, HGST's proprietary HelioSeal technology enables the storage arrays created by EHT to capture information at high altitudes where traditional air-filled HDDs would fail.

Thirty-four observatories and universities around the world are collaborating to form the Event Horizon Telescope project. The goal of the EHT is to create the first image of a black hole boundary, known as the event horizon: the point at which the force of gravity is so great, even light cannot escape.

By bringing black holes into focus, the EHT will enable astronomers to study space-time in the most extreme environment in the universe. However, black holes are so distant that they span a very small area of the sky, so the EHT group is assembling a telescope that has the highest magnifying power possible from the surface of the earth. To do this, the EHT uses a global array of telescopes in 10 geographic locations around the world, recording data at a rate of 64 gigabits/second. When the resulting petabytes of data are processed at a central location, the EHT becomes a virtual radio dish as large as the earth that can resolve objects 2,000 times finer than the Hubble Space Telescope.

"HGST's contribution to the Event Horizon Telescope project has helped EHT accurately capture and store the massive amounts of data coming in from all the telescopes located around the globe," said Shep Doeleman, professor at the Harvard-Smithsonian Center for Astrophysics/Massachusetts Institute of Technology, who directs the Event Horizon Telescope project.
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