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As NASA's Cassini dove close to Saturn in its final year, the spacecraft provided intricate detail on the workings of Saturn's complex rings, new analysis shows

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On June 12, NASA's OSIRIS-REx spacecraft performed another significant navigation maneuver--breaking its own world record for the closest orbit of a planetary body by a spacecraft.

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After nearly 16 years of exploring the cosmos in infrared light, NASA's Spitzer Space Telescope will be switched off permanently on Jan. 30, 2020.

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Nestled within this field of bright foreground stars lies ESO 495-21, a tiny galaxy with a big heart.

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The Expedition 59 crew collected blood and breath samples today to test new biomedical gear and protect future astronauts going to the Moon and Mars. The orbital residents also participated in a pair of behavioral studies aboard the International Space Station.

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Researchers at CU Boulder have discovered hints that humanity's favorite star may have a dual personality, with intriguing discrepancies in its magnetic fields that could hold clues to the Sun's own "internal clock."

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Water is so commonplace that we often take it for granted. But too much - or too little of it - makes headlines.

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Anyone who's ever seen aircraft engaged in formation flying can appreciate the feat of staying highly synchronized while airborne.

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Based on preliminary results from a new Gemini Observatory survey of 531 stars with the Gemini Planet Imager (GPI), it appears more and more likely that large planets and brown dwarfs have very different roots.

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The Gemini Planet Imager (GPI), a dedicated planet-finding instrument at the Gemini South telescope in Chile, is concluding a 4-year survey - the GPI Exoplanet Survey (GPIES) - of 531 young, nearby stars searching for giant planets.

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