Latest Io Stories

New Sensor Developed To Scan Planetary, Lunar Atmospheres
2013-10-07 13:41:22

Researchers from Chalmers University of Technology in Sweden have announced the development of a groundbreaking sensor that could eventually be used to scan the atmospheres of Jupiter’s moons and other planetary bodies.

Origins Of Unusual Radiation Ring
2013-09-24 10:50:24

At the dawn of the space race, as two global powers jockeyed for technological supremacy, the ultimate goal was to be the first to send astronauts into space and onto the Moon. While space exploration is rife with challenges, one hurdle in particular brought into question whether man would ever leave low Earth orbit: the Van Allen radiation belts.

ESA Cluster Satellites Achieve Closest-Ever Approach Thursday
2013-09-21 07:39:16

The close approach of two of the European Space Agency’s (ESA) four identical Cluster satellites this week provided researchers with a rare opportunity to collect valuable information with unprecedented detail.

Europa Surface Cracks Associated With One-Time Tilted Axis
2013-09-18 15:05:45

NASA scientists analyzed distinctive cracks lining the surface of Europa and found that the moon use to have a small tilt in its spin. This information could influence calculations of how much of the moon's history is recorded in its frozen shell, how much heat is generated by tides in its ocean, and how long the ocean has been liquid.

Amateur Astronomers See Fireballs Collide With Jupiter
2013-09-15 04:40:06

Amateur astronomers observing Jupiter with video cameras for the past three years have observed a trio of collisions between small stellar objects occurring around the planet.

Latest Io Reference Libraries

2004-10-19 04:45:44

Satellite -- A satellite is an object that orbits another object. With sufficient tangential velocity, the object does not collide with the primary object it orbits, but maintains a distance from that object as the rate at which it falls towards that object is similar to the rate that it travels away, thus the object orbits the primary object and becomes a satellite. In other words: gravitational force serves as the centripetal force needed to make the object circle the primary...

2004-10-19 04:45:44

Galileo Probe -- The Galileo probe was an unmanned probe sent by NASA to study the planet Jupiter and its moons. Named after the astronomer Galileo Galilei, it was launched on October 18 1989 by the Space Shuttle Atlantis and arrived at Jupiter on December 7 1995. Galileo's launch had been significantly delayed by the hiatus in Space Shuttle launches that occurred after the Space Shuttle Challenger disaster, and new safety protocols that were implemented as a result forced Galileo to use...

2004-10-19 04:45:40

Jupiter's Moon Leda -- Leda ("LEE duh") is the ninth of Jupiter's known satellites and the smallest. Discovered by C. Kowal Date of discovery 1974 Mass (kg) 5.68e+15 Mass (Earth = 1) 9.5047e-10 Equatorial radius (km) 8 Equatorial radius (Earth = 1) 1.2543e-03 Mean density (gm/cm^3) 2.7 Mean distance from Jupiter (km) 11,094,000 Rotational period (days) ? Orbital period (days) 238.72 Mean orbital velocity (km/sec) 3.38 Orbital eccentricity 0.1476 Orbital inclination (degrees)...

2004-10-19 04:45:40

Jupiter's Moon Callisto -- With a diameter of over 4,800 km (2,985 miles), Callisto is the third largest satellite in the solar system and is almost the size of Mercury. Callisto is the outermost of the Galilean satellites, and orbits beyonds Jupiter's main radiation belts. It has the lowest density of the Galilean satellites (1.86 grams/cubic centimeter). Its interior is probably similar to Ganymede except the inner rocky core is smaller, and this core is surrounded by a large icy...

2004-10-19 04:45:40

Jupiter's Moon Ganymede -- Ganymede is the largest satellite in the solar system with a diameter of 5,268 km (3270 miles). It is larger than Mercury and Pluto, and three-quarters the size of Mars. If Ganymede orbited the Sun instead of orbiting Jupiter, it would easily be classified as a planet. If Ganymede orbited the Sun instead of Jupiter it could be classified as a planet. Like Callisto, Ganymede is most likely composed of a rocky core with a water/ice mantle and a crust of rock and...

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