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45m電波望遠鏡 @ 国立天文台野辺山
Japan

「ミリ波」と呼ばれる電波を観測できる電波望遠鏡では世界最大級の口径です。この大口径を活かして天体からのかすかな電波をとらえます。大きな望遠鏡は、傾けた時に自分自身の重さで鏡面が変形してしまいます。そこでこの望遠鏡の骨組み構造は、鏡面が変形しても新しいパラボラ面を作り、電波を効率よく集めるように設計されています(ホモロガス変形法)。

https://www.nro.nao.ac.jp/public/teles.html

国立天文台野辺山 ─ 日本の電波天文学の「聖地」

https://www.nro.nao.ac.jp/

戦後間もない頃に誕生した日本の電波天文学は、野辺山にて、太陽電波の観測、さらに45m電波望遠鏡を中心とした宇宙電波の観測によって、世界レベルへと発展しました。

Copyright: 野本夏俊
Type: Spherical
Resolution: 32480x16240
Taken: 03/11/2020
送信日: 04/11/2020
Published: 05/11/2020
見られた回数:

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Tags: observatory; astronomy; radio; space
More About Japan

The eight islands of Japan sprang into existence through Divine Intervention.The first two gods who came into existence were Izanagi no Mikoto and Izanami no Mikoto, the Exalted Male and Exalted Female. It was their job to make the land for people to live on.They went to the bridge between heaven and earth and, using a jewel-encrusted halberd, Izanagi and Izanami churned up the sea into a frothy foam. As salty drips of water fell from the tip of the halberd the first island was formed. Its name was Onogoro.So far, so good. But when Izanagi and Izanami first met on their island, Izanami spoke to Isanagi without being spoken to first. Since she was the female, and this was improper, their first union created badly-formed offspring who were sent off into the sea in boats.The next time they met, Izanagi was sure to speak first, ensuring the proper rules were followed, and this time they produced eight children, which became the islands of Japan.I'm sure you did not fail to miss the significance of this myth for the establishment of Japanese formal society.At present, Japan is the financial capital of Asia. It has the second largest economy in the world and the largest metropolitan area (Tokyo.)Technically there are three thousand islands making up the Japanese archipelago. Izanagi and Izanami must have been busy little devils with their jewelled halberd...Japan's culture is highly technical and organized. Everything sparkles and swooshes on silent, miniaturized mechanisms.They're a world leader in robotics, and the Japanese have the longest life-expectancy on earth.Text by Steve Smith.


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