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NASA's Roman Telescope Will Observe Thousands of Newfound Cosmic Voids

Release date: Monday, December 15, 2025 10:00:00 AM Eastern Standard Time

NASA's Roman Telescope Will Observe Thousands of Newfound Cosmic Voids



The resulting “big data” will help illuminate the nature of dark energy.

What do fizzing champagne glasses and our universe have in common? They’re both full of bubbles! The cosmic bubbles are vast structures hundreds of millions of light-years across. Their walls are outlined by collections of galaxies. The details of these bubbles – their size, shape, and distribution – can tell us more about the mysterious force known as dark energy that is causing the universe’s expansion to accelerate. The upcoming Nancy Grace Roman Space Telescope will detect and measure tens of thousands of cosmic voids, some as small as just 20 million light-years across.

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