公布 中文名称:天文位置 英文名称:astronomical position 定义:通过观测天体确定的,或用天文经纬度确定的地球上某点的位置。 应用学科: 船舶工程(一级学科);船舶通信导航(二级学科) 点击加载更多 正在加载
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然而如果这颗行星处于很好的位置,天文学家会寻找三样关键的东西:水、空气和岩石。
However, if the planet is in a good position, astronomers look for three key things: water, air and rock.
第二个行星带距离它的恒星为20个天文单位,这相当于太阳系中天王星的位置。
The second asteroid belt lies at about 20 astronomical units from the star, or a position comparable to Uranus in our solar system.
NASA的雷达天文学家周五发现了它的轨迹,并立即将它的位置精确至一公里以内的区域,比此前最好的估计精确了50倍。
NASA radar astronomers picked up its track on Friday and were immediately able to narrow its position to within one kilometer — 50 times better than their previous best estimate.
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