Sept. 29, 2022
Mapmaking
This post is a continuation from yesterday.
Tadataka Ino was originally a merchant, but after he turned 50, he started studying astronomy in earnest.
On his observing the North Star, he noticed that the height of the Pole Star was different when he observed it at his house and when he observed it at his teacher's house.
Based on that, he calculated the diameter of the Earth.
His teacher pointed out that the error should be large because the distance is short. So he wanted to go around Hokkaido.
However, at that time, ordinary people were not allowed to travel freely.
Therefore, Mr. Ino promised the government to mapmaking, and he was allowed to go to travel.
He made a lot of astronomical observations on his way mapmaking.
Then he calculated the diameter of the Earth again.
The calculation results are quite accurate compared to the current ones.
Tadataka Ino is famous for mapmaking by walking all over Japan in Edo period.
But It is very interesting for me that his real passion was astronomy.
伊能忠敬は、元々商人でしたが、50歳を過ぎてから趣味の天文学を本格的に学び始めました。
彼の家で観測した時と先生の家で観測した時で北極星の高さが違う事に気づきました。そしてそのことから地球の直径を計算しました。
先生に距離が短いので誤差が大きいはずだと指摘され、遠くへ行って観測する事を考えました。
しかし、その頃は一般人が自由に旅行することは許されていませんでした。
そこで、伊能は、日本地図を作って政府に献上することを約束して、旅に行く許可を得ました。彼は旅の途中で沢山の天文観測を行いました。
そして、再び地球の直径の計算をしました。それは現代の計算と比較してもかなり正確なものだそうです。
伊能忠敬は、日本中を歩いて地図を作ったことで有名ですが、彼の本当の情熱は天文学にあったということが、私にはとても面白く感じます。
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Mapmaking
This post is a continuation from yesterday.
Tadataka Ino was originally a merchant, but after he turned 50, he started studying astronomy in earnest.
On his observing the North Star, he noticed that the height of the Pole Star was different when he observed it at his house thand when he observed it at his teacher's house.
On his observing the North Star, he noticed that the height of the Pole Star was different when he observed it at his house than when he observed it at his teacher's house.
Based on that, he calculated the diameter of the Earth.
His teacher pointed out that the error should be large because the distance is short.
So he wanted to goBecause of this, he wanted to make observations from all around Hokkaido.
Because of this, he wanted to make observations from all around Hokkaido.
However, aAt that time, however, ordinary people were not allowed to travel freely.
At that time, however, ordinary people were not allowed to travel freely.
Therefore, Mr. Ino promised the government to mapmaking, andhat he'd make maps for them and then he was allowed to go to travel.
Therefore, Mr. Ino promised the government that he'd make maps for them and then he was allowed to travel.
He made a lot of astronomical observations on his wayduring his mapmaking.
He made a lot of astronomical observations during his mapmaking.
Then he calculated the diameter of the Earth again.
The calculationed results awere quite accurate compared to the currentexisting ones.
The calculated results were quite accurate compared to the existing ones.
Tadataka Ino is famous for mapmaking byecause he walking ed all over Japan induring the Edo period.
Tadataka Ino is famous for mapmaking because he walked all over Japan during the Edo period.
But It is very interesting for me, however, that his real passion was astronomy.
It is very interesting for me, however, that his real passion was astronomy.
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面白そうです。教えてくれてありがとうございます。よく出来ました！
Oct. 12, 2022
Thank you for your corrections.
This post is a continuation from yesterday.
Tadataka Ino was originally a merchant, but after he turned 50, he started studying astronomy in earnest.
On his observing the North Star, he noticed that the height of the PoleNorth Star was different when he observed it at his house andcompared to when he observed it at his teacher's house.
On observing the North Star, he noticed that the height of the North Star was different when he observed it at his house compared to when he observed it at his teacher's house.
I think North Star and Pole Star both refer to the same star? So maybe choose one so it's not confusing.
Based on that, he calculated the diameter of the Earth.
His teacher pointed out that the calculation error shwould be largconsiderable because of the short distance is shortnvolved.
His teacher pointed out that the calculation error would be considerable because of the short distance involved.
So he wanted to go aroundtravel to Hokkaido.
So he wanted to travel to Hokkaido.
However, at that time, ordinary people were not allowed to travel freely.
Therefore, Mr. Ino promised the government to mapmakinghat he would make maps, and he was allowed to go to travel.
Therefore, Mr. Ino promised the government that he would make maps, and he was allowed to go to travel.
He made a lot of astronomical observations on his way mapmakingtravels.
He made a lot of astronomical observations on his travels.
Probably don't need to mention map making again, as it's implied by the previous sentence.
Then he calculated the diameter of the Earth again.
The calculation results are quite accurate compared to the current ones.
Tadataka Ino is famous for mapmaking bythe maps he produced whilst walking all over Japan in the Edo period.
Tadataka Ino is famous for the maps he produced whilst walking all over Japan in the Edo period.
But It is very interesting for me that his real passion was astronomy.
Feedback
Tadataka Ino, what an inspirational man!
Oct. 12, 2022
Thank you for your corrections and comments. They are very useful.
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Mapmaking This sentence has been marked as perfect! |
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This post is a continuation from yesterday. This sentence has been marked as perfect! This sentence has been marked as perfect! |
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Tadataka Ino was originally a merchant, but after he turned 50, he started studying astronomy in earnest. This sentence has been marked as perfect! This sentence has been marked as perfect! |
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On his observing the North Star, he noticed that the height of the Pole Star was different when he observed it at his house and when he observed it at his teacher's house.
On I think North Star and Pole Star both refer to the same star? So maybe choose one so it's not confusing.
On his observing the North Star, he noticed that the height of the Pole Star was different when he observed it at his house than |
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Based on that, he calculated the diameter of the Earth. This sentence has been marked as perfect! This sentence has been marked as perfect! |
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His teacher pointed out that the error should be large because the distance is short.
His teacher pointed out that the calculation error This sentence has been marked as perfect! |
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So he wanted to go around Hokkaido.
So he wanted to
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However, at that time, ordinary people were not allowed to travel freely. This sentence has been marked as perfect!
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Therefore, Mr. Ino promised the government to mapmaking, and he was allowed to go to travel.
Therefore, Mr. Ino promised the government t
Therefore, Mr. Ino promised the government t |
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He made a lot of astronomical observations on his way mapmaking.
He made a lot of astronomical observations on his Probably don't need to mention map making again, as it's implied by the previous sentence.
He made a lot of astronomical observations |
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Then he calculated the diameter of the Earth again. This sentence has been marked as perfect! This sentence has been marked as perfect! |
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The calculation results are quite accurate compared to the current ones. This sentence has been marked as perfect!
The calculat |
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Tadataka Ino is famous for mapmaking by walking all over Japan in Edo period.
Tadataka Ino is famous for
Tadataka Ino is famous for mapmaking b |
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But It is very interesting for me that his real passion was astronomy. This sentence has been marked as perfect!
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