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Ganymede is the first moon known to possess a magnetic field. Europa, Jupiter's smallest moon, might not only sustain but foster life according to the research of a University of Arizona professor. Sixty-Five Amazing Galileo Facts. More about Margaret Kivelson.

The Jovian cloudscape boasts the most spectacular light show in the solar system, with northern and southern lights to dazzle even the most jaded space traveler. Could there be life on Europa? Ceres is the closest dwarf planet to the Sun. There may even be cryovolcanoes of cold liquid water.

Dawn's ongoing detailed observations are revealing intriguing insights into the nature of this mysterious world of ice and rock. These rogue planets glow faintly from the heat of their formation.

Please send us email with your wish list and other feedback. There's no place like home. More about Ashwin Vasavada. Jupiter's auroras are hundreds of times more powerful than Earth's, and they form a glowing ring around each pole that's bigger than our home planet. The coastal zone is home to a high fraction of humanity and is increasingly affected by natural and human-induced events from tsunamis to toxic blooms and oil spills.


It is the largest object in the main asteroid belt between Mars and Jupiter, pwi file converter with an equatorial diameter of about kilometers. Download the full size posters above so that you can print them and hang on your walls and share with us on Facebook or Twitter.

Balloon-powered Nanorover These tiny rovers could someday explore the nooks and crannies of our solar system. More about Robert Bob Pappalardo.


These seven rocky worlds huddle around their small, dim, red star, like a family around a campfire. The images are free for you to print.

Galileo even carried a small probe that it deployed and sent deep into the atmosphere of Jupiter, taking readings for almost an hour before the probe was crushed by overwhelming pressure. Evidence of an Ocean Below. Welcome to the Scientist for a Day essay contest.

Galileo Spacecraft Model Galileo was the first spacecraft to orbit Jupiter. Io's complex plasma interactions in Io's atmosphere include support for currents and coupling to Jupiter's atmosphere. The probe measured atmospheric elements, and found that their relative abundances were somewhat different than on the Sun, indicating Jupiter's evolution since the planet formed. Astonishing geology and the potential to host the conditions for simple life make Jupiter's moon Europa a fascinating destination for future exploration. On Earth, wherever we find water, we find life.

The evolution of stellar families - born from the same clumps of gas and dust - is just some of what's on display in this sweeping image. RainCube Radar in a CubeSat is a technology demonstration mission to enable Ka-band precipitation radar technologies on a low-cost, quick-turnaround platform. As you look through these images of imaginative travel destinations, remember that you can be an architect of the future. Jupiter's ring system is formed by dust kicked up as interplanetary meteoroids smash into the planet's four small inner moons. Wandering alone in the galaxy, they do not orbit a parent star.

We welcome your input on features and topics that you would like to see included on this website. They require as much discipline as an athlete working to be a football player, or a musician attempting to land a recording contract. Fantastic Planetary Discoveries.

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The Planetary Science Division's missions have revolutionized our understanding of the origin and evolution of the solar system. Click on any of the thumbnails below to learn more and download a free poster sized image. Voyager set the stage for such ambitious orbiter missions as Galileo to Jupiter and Cassini to Saturn.

However, to this day scientists continue to study the data it collected. Tell Us About It We welcome your input on features and topics that you would like to see included on this website. Spacecraft Double-Team the King of Planets. Ida and Dactyl in Enhanced Color. Spacecraft now allow us the luxury to study these cosmic crossings at times of our choosing from unique locales across our solar system.

They are Earth-sized planets in a spectacular planetary system outside our own. More images taken by the Galileo mission. The heat and frequency of eruption are reminiscent of early Earth. The Galileo mission ended on Sept.

Global Temperature

Io's extensive volcanic activity may be times greater than that found on Earth. Introduction Galileo orbited Jupiter for almost eight years, and made close passes by all its major moons. Beneath its icy surface, Europa is believed to conceal a global ocean of salty liquid water twice the volume of Earth's oceans. Galileo magnetic data provide evidence that the moons Ganymede and Callisto also likely have a liquid saltwater layer.


Imagination is our window into the future. Today both Voyager spacecraft continue to return valuable science from the far reaches of our solar system. But the discovery indicates that the movie's iconic double-sunset is anything but science fiction.

The Search for Alien Earths

Once they cool down, they will be dancing in the dark. Its star is much cooler and redder than our Sun. Simulations of hypothetical impact scenarios run on the Pleiades supercomputer help calculate risks and assess possible damage that might occur when asteroids enter Earth's atmosphere.