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Astronomer Nancy Grace Roman, known as the "Mother" of Hubble, died at 93. Courtesy of NASA hide caption

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Courtesy of NASA

Nancy Grace Roman, 'Mother Of Hubble' Space Telescope, Has Died, At Age 93

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The 46P/Wirtanen comet, as seen through a telescope in France on Dec. 3, is currently making an unusually close pass by Earth. It will be visible, if weather allows, until Dec. 22. Nicholas Biver/AFP/Getty Images hide caption

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Nicholas Biver/AFP/Getty Images

The European spacecraft known as Gaia has unveiled this new view of the Milky Way. ESA/Gaia/DPAC hide caption

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ESA/Gaia/DPAC

You Are Here: Scientists Unveil Precise Map Of More Than A Billion Stars

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Artist's rendering of how the first stars in the universe may have looked. N.R.Fuller/National Science Foundation/Nature hide caption

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N.R.Fuller/National Science Foundation/Nature

Did Dark Matter Make The Early Universe Chill Out?

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A technician examines the mirror on the Large Synoptic Survey Telescope. Scientists at two national laboratories are currently building the components for an enormous digital camera that will capture images from the telescope. Joe McNally/Getty Images hide caption

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Joe McNally/Getty Images

The Largest Digital Camera In The World Takes Shape

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David Reitze of the California Institute of Technology and the executive director of the Laser Interferometer Gravitational-Wave Observatory, or LIGO, speaks at the National Press Club in Washington on Oct. 16. He talks of one of the most violent events in the cosmos, the collision of neuron stars, that was witnessed completely for the first time in August. Susan Walsh/AP hide caption

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Susan Walsh/AP

Until it was surpassed recently by a similar instrument in China, the Arecibo radio telescope in Puerto Rico, completed in 1963, was the world's single largest. Seth Shostak/AP hide caption

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Seth Shostak/AP

Puerto Rico's Arecibo Radio Telescope Suffers Hurricane Damage

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On Nov. 13, 2012, a narrow corridor in the southern hemisphere experienced a total solar eclipse. The corridor lay mostly over the ocean but also cut across the northern tip of Australia where both professional and amateur astronomers gathered to watch. Romeo Durscher/NASA Goddard Space Center/Flickr hide caption

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Romeo Durscher/NASA Goddard Space Center/Flickr

Why Future Earthlings Won't See Total Solar Eclipses

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A total solar eclipse is visible through the clouds as seen from Vagar in the Faroe Islands in March 2015. Eric Adams/AP hide caption

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Eric Adams/AP

Scientists Prepare For 'The Most Beautiful Thing You Can See In The Sky'

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Scientists used the National Radio Astronomy Observatory's Very Large Array near Socorro, N.M., to detect fast radio bursts. Patrick Semansky/AP hide caption

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Patrick Semansky/AP