Conventional theory used to suggest that the Sun and its family of planets formed in near isolation, far away from other stars.
传统的理论认为太阳和它的家族行星是孤立形成的，并且与其他星系相隔很远。
As mentioned above, the planets are far smaller than the sun both in dimension and mass.
正如上面已提到的，行星在体积和质量上比太阳远为小得多。
So far most surveys have backed up the theory: stars rich in metals, such as our Sun, are much more likely to have planets than stars that don't.
到目前，大多数的调查都是支持这一理论：像我们的太阳一样，那些金属富饶的恒星会比其他恒星更有可能拥有行星。
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