US launches spacecraft to observe asteroids over 12 years
米航空宇宙局（NASA）は16日、小惑星群「木星トロヤ群」の世界で初めての接近観測を目指す探査機ルーシーを、フロリダ州のケープカナベラル空軍基地から打ち上げました
NASA launched Lucy, the world’s first close-up observation of the asteroid group ”Jupiter Trojans”, from Cape Canaveral Air Force Base in Florida on the 16th.
Over 12 years, it will tour seven asteroids that orbit almost the same orbit as Jupiter and one between Mars and Jupiter.
It is expected to approach the mystery of the history of solar system formation
トロヤ群は計7千個以上の小惑星の集団で、46億年前に太陽系ができた際の残りかすとされています
The Trojan group is a group of more than 7,000 asteroids, and is said to be the residue of the formation of the solar system 4.6 billion years ago.
There are two groups, front and back of Jupiter, and the surface color is slightly different.
They may have been formed in different places
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