gas giant

基本解释

The object was the gas giant Uranus.
这个物体就是气体巨星天王星。
The exoplanet is a few times the mass of Earth, but it should still be small enough to be rocky rather than a gas giant like Jupiter.
这个系外行星的质量是地球的几倍，但是它还是足够小而能够由岩石构成，而不是像木星是一团巨大的气体。
Moving on through the asteroid belt we enter the realms of the gas giant planets: Jupiter, Saturn, Uranus and Neptune, all of which dwarf the Earth.
穿过小行星带继续前进，我们进入了气体巨行星区域：木星、土星、天王星、海王星，所有这些都使地球看起来像个侏儒。

How do they get that information? What is a star, if not just a giant gas bottle, containerless?
他们是怎样得到信息的？星星是什么？,如果不只是一个巨大的，空空的气体瓶呢？
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one of the four planets in our solar system that are composed chiefly of hydrogen and helium, namely Jupiter, Saturn, Uranus, and Neptune 4