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Dark Energy

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NASA’s Roman Mission Will Test Competing Cosmic Acceleration Theories

NASA’s Roman Mission Will Help Empower a New Era of Cosmological Discovery

NASA Confirms Roman Mission’s Flight Design in Milestone Review

Ground System for NASA’s Roman Space Telescope Moves into Development

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New results from NASA Galaxy Evolution Explorer and the Anglo-Australian Telescope atop Siding Spring Mountain in Australia confirm that dark energy is a smooth, uniform force that now dominates over the effects of gravity.

A panelist sits behind a long, illuminated desk in front a video wall featuring NASA's Nancy Grace Roman Space Telescope during a NASA news conference.

A panelist sits behind a long, illuminated desk in front a video wall featuring NASA's Nancy Grace Roman Space Telescope during a NASA news conference.

A rocket lifts off from a coastal launch pad, sending bright flames and a plume of white smoke across the ground.

A panelist sits behind a long, illuminated desk in front a video wall featuring NASA's Nancy Grace Roman Space Telescope during a NASA news conference.

A rocket lifts off from a coastal launch pad, sending bright flames and a plume of white smoke across the ground.

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