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1·Astronomers know that Pluto and Triton have nearly the same size, mass, and density.

天文学家们知道冥王星和海王卫一拥有几乎相同的体积、质量和密度。《柯林斯英汉双解大词典》

2·First of all, astronomers look for a star.

首先，天文学家要寻找一颗恒星。

3·Particle physicists and astronomers collaborate often.

粒子物理学家和天文学家经常合作。

4·Some blame for the current controversy belongs to astronomers.

有人把如今的争议归因于天文学家。

5·In recent years, astronomers have found nearly 400 new planets with stars.

近年来，天文学家已经发现了近400颗新的有行星的恒星。

6·Now astronomers think it was a meteor that burned up high in the atmosphere.

现在天文学家认为那是一颗在高空燃烧的流星。

7·Astronomers were glad to know that their suppositions about the moon were correct.

天文学家很高兴知道他们对于月球的假设是正确的。

8·Astronomers did eventually figure out what sunspots had to do with magnetic fields.

天文学家最终确实发现了太阳黑子与磁场的关系。

9·Knowing the width of Earth's orbit, the parallax shift lets astronomers calculate the distance.

知道了地球轨道的宽度，视差偏移可以让天文学家计算距离。

10·After many years of scrutinizing, astronomers have found a planet that is similar to the Earth.

经过多年的仔细研究，天文学家发现了一颗与地球相似的行星。

天文学家

1·First of all, astronomers look for a star.

首先，天文学家要寻找一颗恒星。

2·Particle physicists and astronomers collaborate often.

粒子物理学家和天文学家经常合作。

3·In recent years, astronomers have found nearly 400 new planets with stars.

近年来，天文学家已经发现了近400颗新的有行星的恒星。

4·Now astronomers think it was a meteor that burned up high in the atmosphere.

现在天文学家认为那是一颗在高空燃烧的流星。

5·Knowing the width of Earth's orbit, the parallax shift lets astronomers calculate the distance.

知道了地球轨道的宽度，视差偏移可以让天文学家计算距离。

(1)radio astronomern. 射电天文学