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Our journalists and guest bloggers bring you stunning imagery and the space stories that matter most.

Top NASA Scientists Grapple with Budget Cuts

Casey Dreier • December 10, 2013 • 3

Ellen Stofan, NASA's Chief Scientist, and John Grunsfeld, the head of the Science Mission Directorate and a Hubble repair astronaut, highlighted recent NASA science discoveries at the American Geophysical Union conference in San Francisco.

An Open Letter to President Barack Obama

Bill Nye • December 05, 2013 • 17

Bill Nye writes President Obama arguing that the President should embrace a bold future of planetary exploration.

NASA Just Cancelled its Advanced Spacecraft Power Program

Casey Dreier • November 15, 2013 • 32

The Advanced Stirling Radioisotope Program (ASRG) was just cancelled by NASA. This was to be the saving grace for Plutonium-238 availability, as it was a much more efficient way to generate electricity than classic RTG systems.

Europe Bypasses Solar System for Upcoming Science Missions

Van Kane • November 06, 2013 • 3

The European Space Agency has selected two astrophysics observatories as its next large science missions, overlooking every proposed planetary mission. ESA's current selection of planetary missions, however, means it will still be a major player in solar system exploration for the next two decades.

Laser Bees Update

Bruce Betts • October 29, 2013 • 3

An update from University of Strathclyde researchers about the Planetary Society sponsored laboratory Laser Bees asteroid deflection project including a new laser and other lab equipment, and the start of new related projects.

Google+ Hangout with ESA about Europe's Mars exploration

Emily Lakdawalla • October 04, 2013

The European Space Agency invited me to join Mars Express project scientist Olivier Witasse, and spacecraft oeprations manager Michel Denis for a Hangout on Europe's recent and future exploration of Mars and Phobos.

The "Starship Century" Beckons

Mat Kaplan • October 01, 2013

The Benford brothers provide inspiration and hard fact in their excellent new anthology about interstellar travel.

Europe Will Select Its Next Major Science Mission in November

Van Kane • September 25, 2013 • 2

The European Space Agency will announce two major science missions this November, one of which is likely to be devoted to solar system exploration.

NASA's Europa Mission Concept Rejects ASRGs -- May Use Solar Panels at Jupiter Instead

Casey Dreier • September 05, 2013 • 6

The Advanced Stirling Radioisotope Generator (ASRG) is no longer an option for powering a potential Europa mission. The ASRG uses Plutonium-238 to generate electricity, but is far more efficient than past RTGs.

Small Could Be Beautiful - Planetary SmallSats

Van Kane • August 23, 2013 • 4

A new breed of small planetary spacecraft may allow for more frequent flights to the planets for highly focused missions.

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