哈雷知道，天文单位是所有天文学测量中最基本的。
Halley was aware that the AU was one of the most fundamental of all astronomical measurements.
天文学家一般以太阳的半径为基本单位表征恒星的大小。
Astronomers generally measure the size of stars in terms of the radius of our sun.
主办单位希望，国际天文年活动能「提高各界对天文学深具启发性的层面的体认」，所以大家一起来玩个尽兴，今年就拿起望远镜来看星星吧！
Organizers hope that the activities of IYA will "promote a greater appreciation of the inspirational aspects of astronomy. " So join the fun. Look through a telescope this year!
主办单位希望，国际天文年活动能「提高各界对天文学深具启发性的层面的体认」，所以大家一起来玩个尽兴，今年就拿起望远镜来看星星吧！
Organizers hope that the activities of IYA will "promote a greater appreciation of the inspirational aspects of astronomy. " So join the fun. Look through a telescope this year!
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