NASA’s New Hubble E-Book Spotlights Universe’s Best-Kept Dark Secrets

NASA’s Hubble Space Telescope team has released a new downloadable e-book in the Hubble Focus series, called “Hubble Focus: The Dark Universe.” This e-book highlights the mission’s recent discoveries about two mysterious components of our universe, known as dark energy — an unexplained cosmic pressure that’s speeding up the universe’s expansion — and dark matter, […]

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