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，但是它足够小，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。

The object was the gas giant Uranus.

这个物体就是气体巨星天王星。

The exoplanet, called WASP-12b, is a gas giant, like Jupiter.

这颗命名为WASP - 12b的系外行星是一颗类似于木星的巨大气态星球。

It may also rain rocks and be the core of a vaporized gas giant.

它也可能下岩石雨，也可能成为巨大汽化气的核心。