Let’s read aloud first. 最初に声を出して読んでみましょう。
The planet was discovered by a famous American astronomer, Clyde Tombaugh, in 1930. At the time when Tombaugh discovered Pluto, people considered it was a planet however, it was reclassified in 2006 as a dwarf planet because it was too small in comparison with the other planets in our solar system. Pluto is 7.2 billion kilometers from the earth. NASA probe, New Horizons, launched in 2006 and conducted a study of Pluto and its moons in 2015. It took good pictures of it. Pluto has its own features.
astronomer (天文学者), Clyde Tombaugh (クライド トンボ―, アメリカの天文学者), Pluto (冥王星), reclassify (再分類する), dwarf planet (小惑星), in comparison with (比較して), solar system (太陽系), probe (探査機), conduct (実施する)
Questions:
- When was the planet Pluto found?
- Who was the first one to find Pluto?
- Why was Pluto reclassified as dwarf planet?
- How far was Pluto from earth?
- Which spacecraft took its pictures?
- What is your opinion?