This graphic depicts the orbit of comet C/2013 A1 Siding Spring

July 25, 2014

NASA Mars Spacecraft Prepare for Close Comet Flyby

NASA is taking steps to protect its Mars orbiters, while preserving opportunities to gather valuable science, as Comet C/2013 A1 Siding Spring nears Mars on Oct. 19.

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Rotating Shape Model of Rosetta's Comet Target

July 24, 2014

Surface impressions of Rosetta's comet

Images of Rosetta's target comet resolve structures as small as 330 feet (100 meters) across.

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Surface-water depletion in the Colorado River Basin has left this

July 24, 2014

Parched West Is Using Up Underground Water: NASA/UCI

A new study finds more than 75 percent of recent water loss from the Colorado River Basin came from underground sources, with grave implications for the West's water supply.

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NEOWISE Spies Activity on Comet Catalina

July 23, 2014

NEOWISE Spots a Comet That Looked Like an Asteroid

Comet C/2013 UQ4 (Catalina) was originally thought to be an asteroid, but observations by NASA's NEOWISE spacecraft indicate that it's a comet.

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Artist rendering of commercial Mars satellites providing communications back to Earth.

July 23, 2014

NASA Seeks Proposals for Commercial Mars Data Relay Satellites

NASA has issued a Request for Information (RFI) to investigate the possibility of using commercial Mars-orbiting satellites for telecommunications with future Mars missions.

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Gauging an Alien World's Size

July 23, 2014

The Most Precise Measurement of an Alien World's Size

NASA's Kepler and Spitzer space telescopes have made the most precise measurement yet of the size of a planet beyond our solar system.

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The Space Between: This artist's concept shows the Voyager 1

July 23, 2014

NASA Voyager Statement About Solar Wind Models

NASA's Voyager Project Scientist Ed Stone responds to an alternate model for the interaction between the heliosphere and the interstellar medium.

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Carbon in Smoke Plumes

July 18, 2014

OCO-2 Data to Lead Scientists Forward into the Past

Scientists will use a virtual time machine to trace carbon dioxide observations from NASA's Orbiting Carbon Observatory-2 back to their sources.

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NASA's 10-year-old Aura satellite, which studies Earth's atmosphere

July 17, 2014

A 10-Year Endeavor: NASA's Aura and Climate Change

NASA's Aura satellite, celebrating its 10th anniversary this week, continues to help scientists understand how Earth's climate varies and how it will continue to change.

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Voyager scientist honored

July 17, 2014

Voyager Project Scientist Ed Stone Honored

Ed Stone, project scientist of NASA's Voyager mission since 1972 and a former JPL director, has received an American Astronautical Society lifetime achievement award.

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