What Will Japan Aim for After the Shuttle?

Published in Nikkei
(Japan) on 13 July 2011
by (link to originallink to original)
Translated from by Kenny Nagata. Edited by .

Edited by Michelle Harris

 

 

The American space shuttle program will completely shut down with the Atlantis, which is currently in flight.

In the 30 years since the first flight in 1981, the world’s manned space development has relied on the shuttle program. Seven people from Japan have embarked and learned manned space flight technology from the Americans. However, how will they use this technology? The direction of Japanese space development after the shuttle is unclear.

The 30 years of the shuttle program cycled between the embodiment of the dream of space travel and tragic accidents with a constant battle over costs. The shuttle was developed as a general-purpose machine that would be able to transport man-made satellites or space laboratories frequently at a low cost, but practically every time the shuttle returned, careful maintenance was needed and the frequency of the trips did not increase.

A total of 14 astronauts perished in two large accidents, and there was a long suspension of flights. In total, 135 flights took place with four shuttles. One flight costs on average approximately $1 billion (about 80 billion yen). NASA’s goal of a low cost means of transportation was quite far off.

For the past number of years, we have given our attention to the transportation of goods and personnel to the International Space Station. If there were no space shuttle, the station would certainly not exist. The discontinuation of the shuttle is “the end of an era.” (Astronaut Kouichi Wakata)

The discontinuation of the shuttle means that America has, for the time being, lost its means to transport people into space and will have to rely on the Russian Soyuz. The Obama administration has turned over development and implementation of the next generation shuttlecraft to the private sector and assigned NASA to investigate Mars as its major long-term goal. China has independently achieved a manned flight. Space development is multipolar and, as diversification progresses, the framework of international cooperation will change.

How will our country make the best use of the technology and experience it has gained through participation in the shuttle program and space station? The government has only casually discussed this.

The diverse purposes of space development range from ensuring safety, investigating resources and preventing disasters. However, we don’t have the leverage to progress in things like manned-flights or space explorations like Hayabusa [“Falcon” in Japanese]. The government’s Headquarters for Space Development Strategy needs to show the way to overcome the bureaucratic barriers, but has not yet fulfilled its role.

At this critical juncture of the shuttle discontinuation, it is time for Japan to reaffirm the purpose and significance of the investment in space development. There is a need to thoroughly discuss how to deal with prioritization from here on out.


米国のスペースシャトルが、現在飛行中の「アトランティス」を最後にすべて引退する。

1981年の初飛行以来30年間、シャトルは世界の有人宇宙開発を支えてきた。日本は7人の宇宙飛行士を搭乗させ、有人宇宙飛行の技術を米国から学んだ。だが、習得した技術をどう使うのか。シャトル後の日本の宇宙開発の方向が見えない。

シャトルの30年は、宇宙飛行の夢の体現と悲惨な事故の繰り返しであり、コストとの闘いの連続だった。シャトルは人工衛星や宇宙実験室などを低コストで頻繁に宇宙へ運ぶ汎用機として開発されたが、実際には帰還のたびに入念な補修が要り、頻度も思うように増やせなかった。

計14人の飛行士が亡くなった2度の大事故で、長期の飛行中断もあった。総飛行回数は4機で135回。1回当たり平均約10億ドル(約800億円)も費やした。米航空宇宙局(NASA)が狙った低コストの輸送手段とするあては外れた。

ここ数年は国際宇宙ステーションへの人員と物資輸送にほぼ専念した。シャトルがなければ、ステーションは決して実現しなかった。その引退は「一つの時代の終わり」(若田光一宇宙飛行士)を記す。

シャトル引退で米国は宇宙へ人間を運ぶ手段をしばらく失い、ロシアのソユーズに依存する。オバマ政権はシャトル後継機の開発や運用は民間に まかせ、NASAには火星探査という長期の大目標を与えた。中国は単独で有人飛行の実績を重ねている。宇宙開発は多極化、多様化が進み国際協力の枠組みも 変わる。

シャトルと宇宙ステーション計画への参加で学んだ技術と経験を、わが国はどう生かすのか。政府は議論をおざなりにしてきた。

宇宙開発の目的は安全保障、資源探査、防災など幅広い。だが「はやぶさ」のような宇宙探査や、有人飛行など、あれもこれも進める余裕はない。政府の宇宙開発戦略本部が省庁の壁を超えた議論を導くべきだが、その役割を果たしていない。

シャトル引退の節目にあたって、日本が宇宙開発に投資する目的や意義を再確認すべきだ。これからどんな優先順位で取り組んでいくのかをしっかり議論する必要がある。
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