他致力于有关行星运动的科研成果，并且尝试运用理论来解释它们。
He looked at these results about the motion of planets and try to come up with the theory that could explain them.
行星研究学家艾伦·斯坦，NASA前科研协理署长，称新理论“十分新颖独特，”但不容易证明其正确性。
Planetary scientist Alan Stern, former NASA associate administrator for science, said it is a "very clever new idea," but one that is not easily tested to learn whether it is right.
第四颗行星被另一个科研小组于2004年发现，它有着地球十倍的质量，而且是与那颗已知恒星距离最近的。
A fourth object, which has more than ten times the mass of Earth and is the nearest to the star yet found, was noticed by another team in 2004.
应用推荐