planetary

• Rather, we infer that planetary systems must be quite common .
  相反，我们的结论是行星系统的存在一定相当普遍。
• Planetary perturbations make the earth's orbit about the sun irregular .
  行星的摄动使得地球绕太阳的轨道是不规则的。
• These bands must introduce longitudinal asymmetry in the planetary albedo .
  这些云带必定引起行星反照率的经向不对称性。
• It is reasonable to suppose that other stars are also attended by planetary system .
  有理由猜测别的恒星也伴有行星系统。
• New discoveries about uranus excited planetary astronomers in 1977 .
  一九七七年对天王星的几项新发现振奋了行星天文学家。
• The sciences of planetary geology have benefited tremendously from these new finds .
  行星地质科学从这些新发现中受益匪浅。
• Many objections can be raised to this picture of planetary nebula formation .
  形成行星状星云的这一图像可能会引起许多异议。
• During the early stages of planetary evolution they served to sweep the solar system .
  在行星演化的早期，他们用来清扫太阳系。
• Travel to the planetary systems of other stars is a much more formidable undertaking .
  要航行到其他恒星的行星系中去是件极难实现的事。
• Very accurate predictions of planetary orbits require corrections to the central-field approximation .
  想要非常准确地预言行星的轨道，就需要对中心场近似进行修正。