天文学家使用WISE已经找到了太阳系附近的6个Y型的褐矮星——都在40光年以内。
Astronomers using WISE have spotted six Y-class brown dwarfs close to our sun — within a distance of 40 light-years.
与太阳系最为相像的是大熊座47行星系，大熊座47是一颗太阳型恒星，比太阳稍微老一点。
The system most like the Solar System (so far) is that of 47 Ursae Majoris (47 UMa) - a solar-type star, a bit older than the Sun.
本文讨论了太阳系P型逆行小天体运动的稳定区域问题。
In this paper, the problem on the stable region of the motion of P-type retrograde minor bodies in the solar system is discussed.
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