比邻星[bǐ lín xīng]
{天} Proxima Centauri （半人马座; 离太阳最近的一颗恒星）
1. Proxima：是一个假设包围着太阳系的球体云团,布满着不少不活跃的彗星,距离太阳约50,000至00,000个天文单位,差不多等于一光年,即太阳与比邻星(Proxima)距离的四分一.
1. 比邻星的意思
1. 至於仅次於太阳的最近恒星比邻星，它距离我们4.2光年，实在遥远得多了。
The distance between the Earth and the Sun is said to be 8 light-minutes.
2. 即使最近的恒星系统——比邻星，也位于四光年开外的地方，所以对于地球上的我们来说，比邻星是四年前其光线开始传播时的样子。
Even the nearest star system, Proxima Centauri 比, lies more than four light-years away, so it appears to us on Earth as it was just over four years ago when the light began its journey.
3. 在这片约100光年阔的天区，暗黑的尘埃散布於发亮的星云前，而图右方海马型的星际巨柱，长度为20光年，等於太阳与最近我们的恒星－比邻星的4倍距离。
It lies about 170, 000 light-years away near the Tarantula nebula, one of the most active star-forming regions in our Local Group of galaxies.
4. 科学家推测，比比邻星离我们更近的冷恒星的存在是有可能的。比邻星距离我们是4个光年。
Scientists speculate it is possible that a cool star lurks right under our noses, closer to us than our nearest known star, Proxima Centauri, which is four light-years away.