Jupiter Today Top Stories
Jupiter Today - Jupiter News as it Happens

Differences Between Ganymede and Callisto Explained
Differences in the number and speed of cometary impacts onto Jupiter's large moons Ganymede and Callisto some 3.8 billion years ago can explain their vastly different surfaces and interior states, according to research scientists

Jupiter's Moons - 400 Years After Galileo
On Jan. 7, 1610, Galileo Galilei's improvements to the telescope enabled humanity to see Jupiter's four largest moons for the first time.

First Global Geological Map of Jupiter's Moon Ganymede
Scientists have assembled the first global geological map of the solar system's largest moon -- and in doing so have gathered new evidence into the formation of the large, icy satellite.

Jupiter Captured Comet for 12 Years
Comet 147P/Kushida-Muramatsu was captured as a temporary moon of Jupiter in the mid-20th century and remained trapped in an irregular orbit for about twelve years.

Ganymede Makes Big Impression on Jupiter's Aurora
Studies of features in Jupiter's spectacular and rapidly changing aurorae have given new insights into the complex electromagnetic interactions between the giant planet and two of its innermost moons.

Hubble Space Telescope Captures Rare Jupiter Collision
Hubble has taken the sharpest visible-light picture yet of atmospheric debris from an object that collided with Jupiter on July 19.



Saturn Today Top Stories
Saturn Today - Saturn News as it Happens

Negative Ions a Positive Sign for Liquid Water in Enceladus
In dives through the water ice plume of Enceladus, the Cassini plasma spectrometer has found unexpected populations of charged molecules and dust that strengthen arguments for the presence of liquid water and the ingredients for life inside the moon.

NASA Cassini Significant Events 01/27/10 - 02/02/10
The most recent spacecraft telemetry was acquired on Feb. 1 from the Deep Space Network tracking complex at Madrid, Spain. The Cassini spacecraft is in an excellent state of health and all subsystems are operating normally.

NASA Extends Cassini's Tour of Saturn
NASA will extend the international Cassini-Huygens mission to explore Saturn and its planets to 2017. The agency's fiscal year 2011 budget provides a $60 million per year extension for continued study of the ringed planet.

NASA Cassini Significant Events 01/20/10 - 01/26/10
The most recent spacecraft telemetry was acquired on Jan. 26 from the Deep Space Network tracking complex at Madrid, Spain. The Cassini spacecraft is in an excellent state of health and all subsystems are operating normally.

NASA Cassini Significant Events 01/13/10 - 01/19/10
The most recent spacecraft telemetry was acquired on Jan. 19 from the Deep Space Network tracking complex at Madrid, Spain. The Cassini spacecraft is in an excellent state of health and all subsystems are operating normally.

New Wrinkles on Titan
In this image from Titan, two generally similar features, upper center and lower right, appear to be low mountains with grooves running roughly in the up-down direction. A set of straight lines are also visible at lower left. But what made the grooves?