Io was the first moon to be discovered orbiting a planet other than Earth! Sometimes one Galilean can cast its shadow on another! Such an occurance is called a mutual eclipse. It is possible for two or three Galilean moons to cast their shadows on Jupiter at the same time! (1.6.x) But never all four at once! The eclipses of Io led astron- omers to the first determina- tion of the speed of light! The Galilean moons were discovered in 1610!
#Fun facts about io moon download#
Jupiter Moon Tracker: gener- ate and download charts of locations of Jupiter's major moons and rings over time. Jupiter Viewer: find the tilt of Jupiter, its rings, and the location of its major moons, for any time and date. Links to interactive features that show Jupiter's orbit in 3-D can be found on our Solar System pageĮxcellent tool for advanced Galilean moon enthusiasts: Gravity Simulator. Note: some links are echoed elsewhere on this page and may include descriptive text.Īn excellent interactive NASA site: Mission Juno When it approached Jupiter in 2016, the Juno spacecraft was travelling at 165,000 mph and was the fastest object ever made by humankind! Some astronomers consider Jupiter a "star that failed!" It does not have enough mass for stellar nuclear reactions to have begun in its core. Jupiter's moon Europa is believed to have twice as much water as Earth! Jupiter's "Great Red Spot" appears to be shrinking! A hundred years ago it was twice as long as it is now! Jupiter is a massive planet, 2½ times more massive than all of the other planets com- bined!Įvery so often, three solar eclipses occur on Jupiter at the same time!
Jupiter rotates on its axis so rapidly, once every 10 hours, that its equator is moving faster than Earth's "escape velocity!" 2 Map 1 w/Labels Map 2Ĭurrent Galilean Positions Viewed from Earth Wikipedia page NASA page JPL Photojournal They are a treat not to be missed! Current Positions from Earth These can be observed even through a modest tele. Galileo's Observations of the 4 Major Moons Jupiter Moons: at least 79 (more suspected)Ĭomposite View of Galilean Surface Details Motions of Jupiter, the Trojans & the Hildas Orbit Shared by: Trojan and Hilda Asteroids Superior Planet (has larger orbit than Earth) Outer Planet (along with Saturn, Uranus & Neptune) In 3-D (look for the Galilean Moons too!) NASA Vid: Atmospheric Motion at Great Red Spotĭepth of Cloud Bands Juno Cloud Animation Magnetic Polarity: opposite that of Earth Note: different latitudes on the Gas Giants
Gravity at Apparent "Surface" (Earth = 1): 2.530 View Jupiter in 3-D! Another 3-D in OrbitĬurrent Views and Conditions from Earth GalileansĬurrent Location in the Constel.
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