Jupiter TOP STORY

Europa - Chaos on a Watery World

© NASA/JPL/University of Arizona

Europa - Chaos on a Watery World

Jupiter's moon Europa is brimming with water. Although it is thought to be mostly made up of rocky material, the moon is wrapped in a thick layer of water - some frozen to form an icy crust, some potentially pooled in shallow underground lakes or layers of slush, and vast quantities more lurking even deeper still in the form of a giant subsurface ocean.


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Jupiter TOP STORIES

Volcano Loki on Io Observed From Earth

© Max-Planck-Gesellschaft

Loki

With the first detailed observations of a lava lake on a moon of Jupiter, the Large Binocular Telescope Observatory in Arizona places itself as the forerunner of the next generation of Extremely Large Telescopes.

Explosions of Jupiter's Aurora Linked to Planet-Moon Interaction

Explosions of Jupiter's Aurora Linked to Planet-Moon Interaction

On Earth, bursts of particles spewed by the Sun spark shimmering auroras, like the Northern Lights, that briefly dance at our planet's poles.


Possible Underground Ocean on Jupiter's Moon Ganymede

Possible Underground Ocean on Jupiter's Moon Ganymede Video in Story

NASA's Hubble Space Telescope has the best evidence yet for an underground saltwater ocean on Ganymede, Jupiter's largest moon.


Hubble Views Jupiter and Its Moon Shadows

Hubble Views Jupiter and Its Moon Shadows Video in Story

Firing off a string of action snapshots like a sports photographer at a NASCAR race, NASA's Hubble Space Telescope captured the rare occurrence of three of Jupiter's largest moons racing across the banded face of the gas-giant planet: Europa, Callisto, and Io.


Using Antarctica to Prepare for Europa Mission

Using Antarctica to Prepare for Europa Mission

Four bleary-eyed men wearing grease-smeared tan jackets or red parkas emerge from what first appears to be a leftover prop from a Mad Max film. Nine silver smokestacks tower above nine fire-engine-red hot water tanks, all bolted down to a large sled.


Signs of Europa Plumes Remain Elusive in Search of Cassini Data

Signs of Europa Plumes Remain Elusive in Search of Cassini Data

The new research provides a snapshot of Europa's state of activity at that time, and suggests that if there is plume activity, it is likely intermittent.


The Origin Of Jupiter's Great Red Spot

The Origin Of Jupiter's Great Red Spot

The ruddy color of Jupiter's Great Red Spot is likely a product of simple chemicals being broken apart by sunlight in the planet's upper atmosphere, according to a new analysis of data from NASA's Cassini mission.


Ganymede Passes In Front of Jupiter's Great Red Spot

Ganymede Passes In Front of Jupiter's Great Red Spot

Hubble treats astronomers to gorgeous close-up views of the eerie outer planets. But it's a bit of a trick when it seems like the planet's looking back at you!


Evidence of 'Diving' Tectonic Plates on Jupiter's Moon Europa

Evidence of 'Diving' Tectonic Plates on Jupiter's Moon Europa

Scientists have found evidence of plate tectonics on Jupiter's moon Europa. This indicates the first sign of this type of surface-shifting geological activity on a world other than Earth.


Massive Eruptions on Io

Massive Eruptions on Io

Three massive volcanic eruptions occurred on Jupiter's moon Io within a two-week period last August, leading astronomers to speculate that these presumed rare "outbursts".


Jupiter's Great Red Spot is Smaller than Ever Measured

Jupiter's Great Red Spot is Smaller than Ever Measured Video in Story

Jupiter's trademark Great Red Spot -- a swirling anti-cyclonic storm larger than Earth -- has shrunk to its smallest size ever measured.


Juno Gives Starship-Like View of Earth Flyby

Juno Gives Starship-Like View of Earth Flyby Video in Story

When NASA's Juno spacecraft flew past Earth on Oct. 9, 2013, it received a boost in speed of more than 8,800 mph (about 7.3 kilometer per second)


Forty Years Ago, Pioneer 10's Closest Approach to Jupiter

On Dec. 4, 1973, NASA's Pioneer 10 spacecraft sent back images of Jupiter of ever-increasing size.


Jupiter and Saturn Are Awash in Diamonds

Jupiter and Saturn Are Awash in Diamonds

Recent work by planetary scientists has indicated that the deep atmospheres of Jupiter and Saturn may contain chunks of diamond floating in a liquid hydrogen/helium fluid.


Juno Prepares For Earth Flyby on Wednesday

Juno Prepares For Earth Flyby on Wednesday

NASA's Juno spacecraft launched aboard an Atlas V rocket from Cape Canaveral Air Force Station, Fla., Aug. 5, 2011, beginning a five-year journey to Jupiter. But it wasn't charted on a direct path. Before it reaches its destination, Juno will greet the Earth one last time. The spacecraft will perform a flyby Oct. 9, passing within 347 miles of Earth.


Stressed Europa Likely Off-Kilter in the Past

Stressed Europa Likely Off-Kilter in the Past

By analyzing the distinctive cracks lining the icy face of Europa, NASA scientists found evidence that this moon of Jupiter likely spun around a tilted axis at some point.


Amateur Astronomers Observe Jupiter Fireballs

Amateur Astronomers Observe Jupiter Fireballs

The solar system is crowded with small objects like asteroids and comets. Most have stable orbits which keep them out of harm's way, but a small proportion of them are in orbits that risk them colliding with planets.



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