北极光的知识(英文版)
发布时间：2020-11-30 来源：文档文库
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Secti on A Fin la nd Norther n Lights The Northern Lights, also known as Aurora “Orealis（北极光）” or the “ Dawn of the North ” , never fail to take your breath Theay. aurora borealis is one of the most sublime（ 超群的）and magnificent natural phenomena on Earth. Before scientists cracked（ 侦破）the mystery of the auroras, men were drawn（ 吸弓丨）and fascinated（强烈 地吸引住）by these dancing and magical lights that were often found in mythology（神话）and lege nds. In Roma n Mythology, it is said that the Aurora is the deity（神）of the dawn. In North America, the Inuits （爱斯基摩人）have many lege nds that expla in them as spirits of the dead. They believed that the lights are the esse nces（精华）of deer, salmon（鮭鱼）,seals and other animals that they hunted. Aristotle （ 亚 里斯多德）thought it was glowing air gushing（ 喷出）from cracks in the sky. The appearanee of the red aurora in medieval（ 中世纪的） times was feared as a bad ome n （前兆）or a sig n of God's an ger. They believed the manifestation （显现）of the aurora indicated famine or war. Charles Hall （查尔斯•霍尔）,a 19th-century polar explorer, exclaimed: "Who but God can conceive（ 想出）such infinite（无穷的） sce nes of glory?" Oddly eno ugh, the Maori （ 毛利人）thought that the displays were just reflections of a campfire（ 营火）or torches.
Regardless whether you believe the scie ntific facts or the lege nds behind its existenee, you ' II still be ca吸Vfetedy these super natural display of lights, and there are coun tless desti nati ons where you can see the majestic phe nomenon. Fin la nd （芬兰），for example, should be a represe ntative. Many visitors to Fi nla nd come with hopes of see ing the Finland Norther n Lights. The best place to see the Norther n Lights in Fi nla nd is in the no rther n Lapland regi on（
拉普兰地
区）,which is almost en tirely located within the realm（ 区域）of the Arctic Circle （北极圈）.During the dark win ter mon ths here, whe n the sun rarely peaks（使达至U最高峰）its head over the horizon, you can expect to see the Finland Norther n Lights with regularity, and other peak（ 峰值） seas ons in clude February through March and September through October. The time betwee n 6 p.m. and 1 a.m. is the most intense period of the day. The highest probability within this timespan （时间间隔）to see the Finland Norther n Lights is betwee n 9 p.m. and 11:30 p.m., though they are certainly not restricted to this time frame. If you have never see n the Norther n Lights wherever they com mon ly occur in the world, then you will be amazed the first time when you lay eyes on them. The Norther n Lights are similar to a sun set in the sky at ni ght, but appear occasi on ally in arcs（弧光）or spirals（螺旋形物）usually followi ng the earth's magnetic （磁性的）field. They are most often light green in color but often have a
hint of pink. Swirling（ 涡旋形的）shades of blue, gree n, and pink are most com mon whe n it comes to the Fi nland Northern Lights. Strong eruptions also have violet（ 紫罗兰色的）and white colours. Red no rther n lights are rare, but can sometimes be observed on lower latitudes（纬度）. The Finland Aurora Borealis, while best see n in Lapla nd, can also be witnessed as far south as the capital city of Helsinki（ 赫尔辛基）from time to time, though on average, there are only some twenty days out of the year whe n view ing them is possible in most souther n parts of the country. Part of the reason why it can be difficult to see the Northern Lights of Fin la nd in Helsi nki is because of the fact that it is hard to escape to dimly lit areas. The relative lack of city lights is just one of the reas ons why the Lapla nd regi on sees some 200 ni ghtly occurre nces every year, and one must also consider the region ' s northern location. The lower reaches（区域）of the Arctic Circle are ideal for view ing the Norther n Lights across the pla net, which is why Can ada and Alaska are good destinations in the Western Hemisphere（半球）. For those who are won deri ng what causes the Norther n Lights in Finland, solar flares（耀斑）are largely responsible. These flares effectively cause solar winds and solar storms, which create lingering（ 游 移的）atmospheric particles or matter. The Aurora Borealis is just caused by these charged（带
电
的）particles（粒子）ejected（喷出）from the sun. When these particles reach the earth, they collide（ 碰撞）with gas atoms in the earth's atmosphere causing them to energise（ 释放出能量） which results in a spectacular multi-coloured light show. As such（ 因此）, scie ntists can often accurately predict whe n the best times are for view ing the Norther n Lights in Finland by keep ing an eye out for（ 留心） solar flares. （ 