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Stories, updates, insights, and original analysis from The Planetary Society.

Learn the rocket equation, part 2

In the second and final chapter of our series, we’ll explore what the rocket equation has to say about travel through the solar system, using the example of launching a rocket to Pluto.

Learn the rocket equation, part 1

Have you ever wanted to learn the fundamental physics behind one of the most basic concepts of rocket science? In part one of our two-part series, we explore the foundations of the famous rocket equation.

An international outpost near the Moon gets closer to reality

International Space Station (ISS) project partners are inching ever closer toward an agreement to begin the development of a new human outpost in the vicinity of the Moon. If successful, the cis-lunar space station (a space station in the vicinity of the Moon) will be the largest international space project to date, influencing the direction of human space flight for decades to come.

SpaceX and the Blank Slate

SpaceX's plans to colonize Mars differ considerably from NASA's Journey to Mars ambitions. But direct comparison is difficult. SpaceX is able to wipe the slate clean and start fresh with a bold new approach to humans in space. NASA has no such luxury, and must use existing pieces and people to make their goals a reality.

Promise, Transition, and Transformation

After 10 days, four NASA centers, two contractors, and hundreds of miles, Casey Dreier shares his initial reflections on the state of NASA's Space Launch System rocket and its future.

OSIRIS-REx is on the launch pad, ready for the big day

The OSIRIS-REx mission passed its flight readiness review yesterday, clearing the way for the spacecraft to launch on Thursday, September 8. Here's a schedule of next week's NASA TV briefings and a photo album of the launch preparations.

SLS Mockup Finds Path through Southern U.S.

The SLS core stage pathfinder is a 65-meter-long, full-size mockup of the actual rocket's main section. Just like SLS, building, assembling and utilizing the pathfinder involves multiple contractors and NASA centers around the southern U.S.

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