Jupiter TOP STORY

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

© NASA

Hubble Looks at Jupiter's Red Spot

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


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

© NASA

Earth-Moon System During Juno Flyby

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.


NASA Exploration Spacecraft Juno is Halfway to Jupiter

NASA Exploration Spacecraft Juno is Halfway to Jupiter

NASA's Juno spacecraft is halfway to Jupiter. The Jovian-system-bound spacecraft reached the milestone today (8/12/13) at 5:25 a.m. PDT (8:25 a.m. EDT/12:25 UTC).


Jupiter's Moon Europa a Mystery with Many Questions

Jupiter's Moon Europa a Mystery with Many Questions

Most of what scientists know of Jupiter's moon Europa they have gleaned from a dozen or so close flybys from NASA's Voyager 2 spacecraft in 1979 and NASA's Galileo spacecraft in the mid-to-late 1990s.


Herschel Links Jupiter's Water to Comet Impact

Herschel Links Jupiter's Water to Comet Impact

ESA's Herschel space observatory has solved a long-standing mystery as to the origin of water in the upper atmosphere of Jupiter, finding conclusive evidence that it was delivered by the dramatic impact of comet Shoemaker-Levy 9 in July 1994.


Are Io's Volcanoes In The Wrong Locations?

Are Io's Volcanoes In The Wrong Locations?

Jupiter's moon Io is the most volcanically active world in the solar system, with hundreds of volcanoes, some erupting lava fountains up to 250 miles high (about 400 kilometers). However, concentrations of volcanic activity are significantly displaced from where they are expected to be, based on models that predict how the moon's interior is heated, according to NASA and European Space Agency researchers.


'Hot spots' ride a merry-go-round on Jupiter

'Hot spots' ride a merry-go-round on Jupiter Video in Story

The dark hot spot in this false-color image from NASA's Cassini spacecraft is a window deep into Jupiter's atmosphere. All around it are layers of higher clouds, with colors indicating which layer of the atmosphere the clouds are in.


ESA Selects Science Instrument and Hardware for European Mission to Jupiter

ESA Selects Science Instrument and Hardware for European Mission to Jupiter

The JUpiter ICy moons Explorer mission, JUICE, will carry a total of 11 scientific experiments to study the gas giant planet and its large ocean-bearing moons, ESA announced today.


 NASA Selects Science Instrument and Hardware for European Mission to Jupiter

NASA Selects Science Instrument and Hardware for European Mission to Jupiter

NASA has selected key contributions to a 2022 European Space Agency (ESA) mission that will study Jupiter and three of its largest moons in unprecedented detail. The moons are thought to harbor vast water oceans beneath their icy surfaces.


Io's Volcanism Controls Jupiter's Magnetospheric Activity

Io's Volcanism Controls Jupiter's Magnetospheric Activity

Jupiter's volcanic moon Io spews out volcanic gas, which reaches its atmosphere and becomes ionized, forming what is known as the Io plasma torus. This plasma torus can interact with Jupiter's magnetosphere, possibly affecting auroral activity there.


Jupiter - Turmoil from Below, Battering from Above

Jupiter - Turmoil from Below, Battering from Above

Jupiter, the mythical god of sky and thunder, would certainly be pleased at all the changes afoot at his namesake planet. As the planet gets peppered continually with small space rocks, wide belts of the atmosphere are changing color, hotspots are vanishing and reappearing, and clouds are gathering over one part of Jupiter, while dissipating over another.


Io's Insane Volcanic Activity

Io's Insane Volcanic Activity

Watching active volcanic eruptions should definitely be done from a distance, but a group of California researchers has figured out how to do it from the comfort of home. Using an ingenious combination of Earth-based telescopic surveys and archival data, they have gathered nearly 40 distinct snapshots of effusive volcanic eruptions and high temperature outbursts on Jupiter's tiny moon, Io, showing details as small as 100 km (60 miles) on the moon's surface.


NASA's WISE Colors in Unknowns on Jupiter Asteroids

NASA's WISE Colors in Unknowns on Jupiter Asteroids

Scientists using data from NASA's Wide-field Infrared Survey Explorer, or WISE, have uncovered new clues in the ongoing mystery of the Jovian Trojans -- asteroids that orbit the Sun on the same path as Jupiter. Like racehorses, the asteroids travel in packs, with one group leading the way in front of the gas giant, and a second group trailing behind.



More top stories from July.