Aeson comet

Before the sun closest approach of the end of this month , is expected to become the ( aqueous ) large bright comet " Aeson comet " has increased the brightness suddenly . It can be observed with the naked eye from around 20 at the earliest , is seen as the beginning of next month is in full bloom , beautiful figure adorning the predawn sky is likely to attract astronomy fan .
Comet small bodies to move the solar system while spewing the dust and gas . Since the ice melts center is closer to the sun , such as gas evaporated extends like a tail , also called comet .
Aeson comet was discovered in September last year . A distance of about 1.17 million km shorter than the diameter of the sun until the approach to the sun on the 29th this month . Because it is not a type orbiting the sun as Halley's comet , observed that this is the precious chance of the first and last .
Difficult to predict the length of the tail and the brightness of the comet . Initially , Aeson comet was expected to also become as bright as the full moon , but it is seen as a degree that is slightly brighter than Venus at the moment . It has increased the brightness rapidly from around 13 , it can be confirmed with binoculars already away from the city .
The visible Aeson comet in the eastern sky before sunrise , expected to be brighter gradually towards the closest approach . Because only position is low, can not be observed that it is not the place to look to the horizon and near the hill . Few days before and after the closest approach to be hidden below the horizon .
December be fading away from the sun , but the location visible increases. Tend towards the closest approach to the sun and later becomes clear the tail of the comet , the most comfortable viewing is expected to be up to 15 daily from 7 daily .
On the sky is not bright , there is a possibility that damage the eye of the sun is close in sight during the day , I have urged experts not observed. Let observation with enough protection against the cold ! !


明るい大彗星（すいせい）になると期待されている「アイソン彗星」が今月末の太陽最接近を前に、急に明るさを増している。早ければ２０日ごろから肉眼で観察でき、見頃は来月上旬とみられ、夜明け前の空を飾る美しい姿が天文ファンを魅了しそうだ。
　彗星はガスやちりを噴き出しながら太陽系を移動する小天体。太陽に近づくと中心部の氷が解け、蒸発したガスなどが尾のように伸びるため、ほうき星とも呼ばれる。
　アイソン彗星は昨年９月に発見された。今月２９日に太陽の直径より短い約１１７万キロの距離まで太陽に接近する。ハレー彗星のように太陽を周回するタイプではないため、観察は最初で最後の貴重なチャンスだ。
　彗星の明るさや尾の長さは予測が難しい。アイソン彗星は当初、満月のように明るくなるとも期待されたが、現時点では金星よりやや明るくなる程度とみられている。１３日ごろから急激に明るさを増しており、市街地から離れた場所では既に双眼鏡で確認できる。
アイソン彗星が見えるのは日の出前の東の空で、最接近に向けて徐々に明るくなる見込み。ただ位置が低いため、高台など地平線付近まで見える場所でないと観察できない。最接近の前後数日は地平線の下に隠れてしまう。
　１２月は太陽から離れて暗くなっていくが、見える位置は高くなる。彗星の尾は太陽への最接近以降の方が鮮明になる傾向があり、最も見やすいのは７日ごろから１５日ごろまでと予想されている。
　日中は空が明るく見えない上、すぐ近くの太陽が視界に入って目を痛める恐れがあり、専門家は観察しないよう呼びかけている。　防寒を十分にして観察しましょう！！