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NASA's Voyager 2 probe now has exited the heliosphere - the protective bubble of particles and magnetic fields created by the Sun. The twin Voyager spacecraft, which launched in , are our ambassadors to the rest of the Milky Way, destined to continue orbiting the center of our galaxy for billions of years after they stop communicating with Earth. On Aug. Each poster went through a number of concepts and revisions, and each was made better with feedback from the JPL experts.

David Delgado, creative strategy: The posters began as a series about exoplanets -- planets orbiting other stars -- to celebrate NASA's study of them. Later, the director of JPL was on vacation at the Grand Canyon with his wife, and they saw a similarly styled poster that reminded them of the exoplanet posters. They suggested it might be wonderful to give a similar treatment to the amazing destinations in our solar system that JPL is currently exploring as part of NASA.

And they were right! The point was to share a sense of things on the edge of possibility that are closely tied to the work our people are doing today. The JPL director has called our people "architects of the future.

As for the style, we gravitated to the style of the old posters the WPA created for the national parks. There's a nostalgia for that era that just feels good. Joby Harris, illustrator: The old WPA posters did a really great job delivering a feeling about a far-off destination. They were created at a time when color photography was not very advanced, in order to capture the beauty of the national parks from a human perspective. These posters show places in our solar system and beyond that likewise haven't been photographed on a human scale yet -- or in the case of the exoplanets might never be, at least not for a long time.

It seemed a perfect way to help people imagine these strange, new worlds. Delgado: The WPA poster style is beloved, and other artists have embraced it before us. Our unique take was to take one specific thing about the place and focus on the science of it. We chose exoplanets that had really interesting, strange qualities, and everything about the poster was designed to amplify the concept.

The same model guided us for the posters that focus on destinations in the solar system. Lois Kim, typography: We worked hard to get the typography right, since that was a very distinctive element in creating the character of those old posters. We wanted to create a retro-future feel, so we didn't adhere exactly to the period styles, but they definitely informed the design. The Venus poster has a very curvy, flowy font, for example, to evoke a sense of the clouds.

Delgado: The Grand Tour is the route the Voyager 2 spacecraft took to visit all four outer planets. We imagined this would be something people might want to repeat, since it's a flight plan that's possible every years or so, when the outer planets are arranged just right.

In the future, it might be considered "quaint" to experience a gravity assist. Harris: Style-wise, the design came from some references we looked at from transparency overlays from the s.

The probe is then only controlled by gravity. Score based on time surviving before collision and proximity to objects. JPL News. The jpl Progamming Language. Java Psion Link. As the program uses the existing Psion Link. Maestro Hack. Maestrohack is an effort to reverse-engineer and write tools for the Mars NASA Maestro tool so that anyone can import raw JPL Mars images and use the image manipulation functions as well as the awesomely cool 3D anaglyph feature.

A set of Java classes and C functions providing a bridge between Java and Prolog. JPL User Manager. This is a user administration application. It allows users to register, login, logout, change password, change registration info and delete their account. DE : Created September ; includes nutations but not librations. This ephemeris was used for the Astronomical Almanac from to See Standish, and Standish, DE : Created October ; includes nutations and librations.

DE : Created May ; includes nutations and librations. Referred to the International Celestial Reference Frame. Fit to planetary and lunar laser ranging data. See Folkner et al. DE : Created May ; includes both nutations and librations. Spans JED DE : Created April ; includes nutations and librations. Plus, a popular planet shows up in the night sky. Cassini scientists are marveling over the ruffles, bumps and temperature changes revealed in Saturn's rings during its equinox.

What's Up for October? Moons and meteor showers. Exciting discoveries from the Cassini mission at Saturn were featured at Open House Open House is on May 2 and 3. Catch highlights of last year's Open House and mark your calendars for this year's event, on May 2 and 3, Learn how to build an icy model of a comet, complete with shooting jets.

Safety precautions are required. This month catch the Perseid Meteor Shower. Take a step back in time and see how astronomers like Galileo studied the moon. When you gaze at the moon, you'll see the same views that enchanted and startled ancient astronomers centuries ago.

Engineers put the rover through spin tests to ensure smooth sailing in space. The operation on the giant, meter-wide foot antenna replaced the hydrostatic bearing assembly, which enables the antenna to rotate horizontally, and the elevation bearings, which enable the antenna to track up and down from the horizon.

On their sixth anniversary of landing on Mars, one of two scrappy rovers faces an uncertain future. The history-making Viking 1 mission launched 35 years ago. The JPL-designed and -built Wide Field and Planetary Camera 2 brought the universe to Earth with its images of baby stars, galaxies, supernovas and more. A proposed mission to Titan would use a balloon, a lander and an orbiter to explore this Earth-like world. Eighty to 90 percent of the heat from global warming is going into Earth's oceans.