Jupiter's moon Io, whose density is 3.5 grams per cubic centimetre, is all rock.
木星的卫星木卫一全是岩石，其密度为每立方厘米3.5克。
Two sulfurous eruptions are visible on Jupiter's volcanic moon IO in this color composite image from the robotic Galileo spacecraft that orbited Jupiter from 1995 to 2003.
在这张来自伽利略航天器的彩色合成照片中我们可以看到，在木星这颗遍布火山的卫星木卫一上，正发生着两场硫磺喷发。伽利略航天器从1995年至2003年一直环绕着木星运行。
These moons heat up from the constant stress and stretching; Jupiter’s moon Io is a leading example.
由于空间持续不断的压力以及拉伸作用使得卫星表面温度不断上升，木星卫星就是一个典型的例子。
Io and Europa are about the same size as our moon, whereas Ganymede and Callisto have diameters that are half again our moon's diameter.
木卫一和木卫二大约和月球一样大，而木卫三和木卫四大概是月球直径的一半。
However, Jupiter's largest moon Ganymede will appear on the same side of Jupiter as Io and Europa, though at some 3 times farther out from the Jovian disk.
然而，木星最大的卫星木卫三将会出现在木卫一和欧罗巴的同一侧，虽然它距离木星近轨有三倍距离。
In February of last year, New Horizons passed Jupiter and the ever-active Jovian moon Io.
去年二月，新视野号飞船通过木星以及曾经很活跃的木卫一。
The jovian moon Io harbors a globe-girdling pool of molten rock beneath its volcano - riddled surface.
木卫一布满火山的表面下拥有一个包围全球的熔岩池。
The jovian moon Io harbors a globe-girdling pool of molten rock beneath its volcano - riddled surface.
木卫一布满火山的表面下拥有一个包围全球的熔岩池。
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