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はやぶさ2、リュウグウに再着陸 世界初の地下岩石採取

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asteroid
小惑星
spacecraft
(ここでは)宇宙探査機
land
着陸する(後出 touch down も同意、landing は着陸〈用の〉)
clue
手がかり
solar system
太陽系
space agency
宇宙航空研究開発機構 (Japan Aerospace Exploration Agency) のこと
rocky
岩の多い、ごつごつした
copper
銅製の
impactor
(穴を開けるための)衝突体
radiation
放射線
topsoil
表土(の)
Hayabusa2 project members smile after the spacecraft successfully landed on the asteroid Ryugu on July 11. (Mainichi)

Hayabusa2 gets underground sample from asteroid   

A Japanese spacecraft landed on a distant asteroid on July 11 and collected underground samples that scientists hope will provide clues to the origin of the solar system billions of years ago, Japan's space agency said.

The Hayabusa2 spacecraft had created a landing crater on the rocky asteroid in April by dropping a copper impactor. It landed near that crater on July 11 and collected samples that scientists believe contain valuable data unaffected by space radiation and other environmental factors.

Hayabusa2 is the first spacecraft to successfully collect underground samples from an asteroid.

The Japan Aerospace Exploration Agency, or JAXA, said data shows Hayabusa2 touched down and rose safely after collecting the samples.

"We took a historic step," said Tsuda Yuichi, the Hayabusa2 project manager. "On a scale of 1 to 100, we scored 1,000."

The asteroid, named Ryugu, was about 300 million kilometers from Earth at the time. Hayabusa2 is expected to leave the asteroid later this year and return home at the end of 2020.

Hayabusa2 made a similar landing at another location on the asteroid in February and collected topsoil samples. (AP)

[本文‐185 words]

週刊英語学習紙 毎日ウィークリー7月27日号

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