![]() ![]() At an orbit of about 262,000 miles (422,000 kilometers), Io crosses Jupiter’s. The Moon has inspired wonder and creativity for thousands of years. The Moon has always held a special place in our imaginations and in daily life. In fact, its composition of silicate rock that envelops a molten core of iron or iron sulfide gives it a density that compares more favorably with the terrestrial planets. ![]() Io’s volcanoes are in a constant state of eruption. With a density of 3.5275 g/cm3, Io has the highest density of all the known moons in the solar system, including our own Moon. Facts about Io Moon for Kids: Io is the most volcanically active moon in the solar system and has over 400 moons. But Io causes just as much trouble for Jupiter. Credit: NASA/GSFC/Arizona State University Chances are that when you imagine the night sky, one of the first things that comes to mind is the Moon glowing in the darkness. Io is the densest moon in the solar system. But where the Moon pulls Earth’s tides to highs and lows of about 60 feet (18 meters), Io’s surface is fluctuating by as much as 330 feet (100 meters). Slightly larger than Earths moon, Io is the fourth-largest moon in the Solar System, has the highest density of any moon, the strongest surface gravity of. It is the fourth-largest moon, has the highest density of all the moons. Britannica Quiz Astronomy and Space Quiz global mosaic of Jupiters moon Io Io is about 3,640 km (2,260 miles) in diameter, a little larger than Earth ’s Moon. One theory for Io's odd heat balance is that the poles may have more volcanic heating than the lower latitudes, or they may be surfaced with materials that cool off slower at night.Ī conference of 250 scientists held this week discuss in Colorado will discuss this another questions about Io and other members of the Jupiter system. The same effect can be seen on Earth because of the Moon. Io (Jupiter I) is the innermost of the four Galilean moons of the planet Jupiter. ![]() Small areas of the volcanoes are far hotter than this, exceeding 1226 degrees Celsius.Īside from hot spots at volcanic sites, however, night temperatures on Io appear to be about the same near the equator as near the poles even though, as on Earth, the equator gets more direct sunshine to heat the surface. It shows that while Earth's tropics are hotter than the polar regions, shows Io doesn't show this pattern.īlue indicates the coldest temperatures of minus 147 degrees Celsius, while oranges and yellows indicate the highest temperatures, in excess of 67 degrees Celsius. The new map from NASA's Galileo spacecraft's 27th orbit of Jupiter is the best view yet provided of Io's night time temperatures. But Earth is only distorted slightly when the moons gravity pulls the surface water into high tides.
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