N-COUNT The solar system is the sun and all the planets that go around it. 太阳系
Saturn is the second biggest planet in the solar system.
土星是太阳系的第二大的行星。
Before last week's announcement, the total number of so-called exoplanets outside our solar system was just over five hundred.
VOA: special.2011.02.09
The goal of the Stardust-NExT spacecraft is to gather scientific evidence about one of the solar system's most changeable objects -- comets.
VOA: special.2011.02.09
Some scientists have called Jupiter the protector of the inner planets and our own Earth -- from objects from the outer solar system.
VOA: special.2009.08.25
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