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The mystery of why Earth has so much water, allowing our “blue marble” to support an astounding array of life, is clearer with new research into comets.

NASA's Mars 2020 spacecraft has completed acoustic and thermal vacuum testing.

NASA announced the selection of a company to develop and demonstrate power, propulsion and communications capabilities for NASA’s lunar Gateway.

Former Jet Propulsion Laboratory Director Edward Stone — currently the David Morrisroe Professor of Physics at Caltech and the project scientist for NASA's Voyager mission for the past 47 years — has been awarded the prestigious Shaw Prize in Astronomy.

From now till Sept. 30, the public can submit names to be etched on microchips that will fly on the Mars 2020 rover and receive a souvenir boarding pass.

NASA's Juno mission to Jupiter made the first definitive detection of a planetary magnetic field that changes over time, a phenomenon called secular variation.

NASA’s New Horizons mission team has published the first profile of the farthest world ever explored, a planetary building block and Kuiper Belt object called 2014 MU69.

The Next Full Moon is a Blue Moon, the Flower Moon, the Corn Planting Moon, the Milk Moon and Buddha Purnima.

NASA's Mars Reconnaissance Orbiter (MRO) completed 60,000 orbits around the Red Planet at 10:39 a.m. PDT (1:39 p.m. EDT) on May 15, 2019.

A photo from NASA's Lunar Reconnaissance Orbiter shows the landing site of the Israeli Beresheet spacecraft on a region of the Moon called Sea of Serenity.

NASA Administrator Jim Bridenstine sent a video message to agency employees Monday about the president’s fiscal year 2020 budget amendment, which will support accelerated plans to land astronauts on the Moon by 2024.

High-resolution images show the Moon's lava plains are part of a much younger, shifting landscape than scientists realized.