最大的类地行星地球的直径仅仅是最小的类木行星海王星的四分之一，而且地球的质量仅仅是其质量的十七分之一。
The largest terrestrial planet, Earth has a diameter only one quarter as great as the diameter of the smallest Jovian planet, Neptune, and its mass is only one seventeenth as great.
也就是说，那些最小的黑洞恐怕真是转瞬即逝或者压根就没存在过。这使得最大的中子星与由最小质量恒星产生的黑洞间存在巨大的差距。
This means that the lowest mass black holes may be very rare, short-lived or non-existent, creating a conspicuous gap between the most massive neutron stars and the least massive stellar black holes.
由于2006年对天体的重新大排位，冥王星失去了它的行星地位，水星就被列为太阳系中最小的行星。
Since the great reclassification of astronomical objects in 2006, which saw Pluto lose its planetary status, Mercury has been listed as the smallest planet in the solar system.
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