英语翻译Thousands of people around the globe step outside to gaze at their night sky.On a clear night,with no clouds,moonlight,or artificial lights to block the view,people can see more than 14,000 stars in the sky,says Dennis Ward,an astronomer

英语翻译Thousands of people around the globe step outside to gaze at their night sky.On a clear night,with no clouds,moonlight,or artificial lights to block the view,people can see more than 14,000 stars in the sky,says Dennis Ward,an astronomer
英语翻译
Thousands of people around the globe step outside to gaze at their night sky.On a clear night,with no clouds,moonlight,or artificial lights to block the view,people can see more than 14,000 stars in the sky,says Dennis Ward,an astronomer with the University Corporation for Atmospheric Research (UCAR) in Boulder,Colo1.But when people are surrounded by city lights,he says,they're lucky to see 150 stars.
If you've ever driven toward a big city at night and seen its glow from a great distance,you've witnessed light pollution.It occurs when light from streetlights,office buildings,signs,and other sources streams into space and illuminates the night sky.This haze of light makes many stars invisible to people on Earth.Even at night,big cities like New York glow from light pollution,making stargazing2 difficult.
Dust and particles of pollution from factories and industries worsen the effects of light pollution."If one city has a lot more light pollution than another," Ward says,"that city will suffer the effects of light pollution on a much greater scale."
Hazy skies also make it far more difficult for astronomers to do their jobs.
Cities are getting larger.Suburbs are growing in once dark,rural areas.Light from all this new development is increasingly obscuring the faint light given off by distant stars.And if scientists can't locate these objects,they can't learn more about them.
Light pollution doesn't only affect star visibility.It can harm wildlife too.It's clear that artificial light can attract animals,making them go off course3.There's increasing evidence,for example,that migrating birds use sunsets and sunrises to help find their way,says Sydney Gauthreaux Jr.,a scientist at Clemson University in South Carolina."When light occurs at night," he says,"it has a very disruptive influence." Sometimes birds fly into lighted towers,high-rises,and cables from radio and television towers.Experts estimate that millions of birds die this way every year.

英语翻译Thousands of people around the globe step outside to gaze at their night sky.On a clear night,with no clouds,moonlight,or artificial lights to block the view,people can see more than 14,000 stars in the sky,says Dennis Ward,an astronomer
数以千计的世界各地的人们走出来的目光在夜空.在一个晴朗的夜晚,没有云彩,月光,或人工灯光来阻止认为,人们可以看到超过14000星在天空中说,丹尼斯区,天文学家公司与大学大气研究（ UCAR ）在博尔德,Colo1 .但是,当人们所包围城市之光,他说,他们很幸运地看到150星.
如果你曾经对推动大城市在夜间看到它光芒从一个很长的距离,您看到光污染.它时,就会发生光路灯,办公楼,标志,和其他来源的溪流进入太空,照亮夜空.这烟霞轻使许多星级看不见的人在地球上.即使在夜晚,大城市如纽约辉光的光污染,使stargazing2困难.
灰尘和颗粒污染的工厂和工业恶化的影响,光污染.“如果一个城市有更多的光污染比另一个,”沃德说,“这个城市将受到影响光污染的更大的规模.”
朦胧的天空也使困难得多的天文学家做他们的工作.
城市是越来越大.郊区越来越一旦黑暗,农村地区.光从所有这一切新的发展是越来越模糊了微光给予关闭遥远恒星.如果科学家们无法找到这些物体,但不能了解他们.
光污染不仅影响明星知名度.它可以伤害野生动物了.很明显,人工光源可以吸引动物,使它们去course3 .有越来越多的证据表明,例如,候鸟使用日落和日出,以帮助找到自己的方式说,悉尼Gauthreaux小科学家克莱姆森大学在南卡罗来纳州.“当光发生在夜间,”他说,“它有一个非常有破坏力的影响.”有时候,鸟类飞入点燃塔,高层建筑,和电缆从广播和电视大楼.专家估计,数以百万计的禽类死亡这种方式每年.

数以千计的世界各地的人们走出来的目光在夜空。在一个晴朗的夜晚，没有云彩，月光，或人工灯光来阻止认为，人们可以看到超过14000星在天空中说，丹尼斯区，天文学家公司与大学大气研究（ UCAR ）在博尔德， Colo1 。但是，当人们所包围城市之光，他说，他们很幸运地看到150星。
如果你曾经对推动大城市在夜间看到它光芒从一个很长的距离，您看到光污染。它时，就会发生光路灯，办公楼，标志，和其...

全部展开

数以千计的世界各地的人们走出来的目光在夜空。在一个晴朗的夜晚，没有云彩，月光，或人工灯光来阻止认为，人们可以看到超过14000星在天空中说，丹尼斯区，天文学家公司与大学大气研究（ UCAR ）在博尔德， Colo1 。但是，当人们所包围城市之光，他说，他们很幸运地看到150星。
如果你曾经对推动大城市在夜间看到它光芒从一个很长的距离，您看到光污染。它时，就会发生光路灯，办公楼，标志，和其他来源的溪流进入太空，照亮夜空。这烟霞轻使许多星级看不见的人在地球上。即使在夜晚，大城市如纽约辉光的光污染，使stargazing2困难。
灰尘和颗粒污染的工厂和工业恶化的影响，光污染。 “如果一个城市有更多的光污染比另一个， ”沃德说， “这个城市将受到影响光污染的更大的规模。 ”
朦胧的天空也使困难得多的天文学家做他们的工作。
城市是越来越大。郊区越来越一旦黑暗，农村地区。光从所有这一切新的发展是越来越模糊了微光给予关闭遥远恒星。如果科学家们无法找到这些物体，但不能了解他们。
光污染不仅影响明星知名度。它可以伤害野生动物了。很明显，人工光源可以吸引动物，使它们去course3 。有越来越多的证据表明，例如，候鸟使用日落和日出，以帮助找到自己的方式说，悉尼Gauthreaux小科学家克莱姆森大学在南卡罗来纳州。 “当光发生在夜间， ”他说， “它有一个非常有破坏力的影响。 ”有时候，鸟类飞入点燃塔，高层建筑，和电缆从广播和电视大楼。专家估计，数以百万计的禽类死亡这种方式每年。

收起