ロケットの射場は赤道に近いほど有利/en - 版の履歴

MamechiAdmin: 英語訳を取り込み（pages/translations_en.json）

2026-10-29T10:34:44Z

英語訳を取り込み（pages/translations_en.json）

← 古い版		2026年10月29日 (木) 19:34時点における版
2行目:		2行目:
	{{豆知識		{{豆知識
	\|番号=0021		\|番号=0021
			\|投稿者=まめち編集部
	\|本文=Launch sites closer to the equator have an advantage. Europe launches from French Guiana in South America near the equator, and Japan put its site on Tanegashima, as far south as possible within the country.		\|本文=Launch sites closer to the equator have an advantage. Europe launches from French Guiana in South America near the equator, and Japan put its site on Tanegashima, as far south as possible within the country.
	\|なぜ=Launching eastward adds the speed of the Earth's rotation (about 1,650–1,670 km/h at the equator).		\|なぜ=Launching eastward adds the speed of the Earth's rotation (about 1,650–1,670 km/h at the equator).

MamechiAdmin: 英語訳の「更新が必要」の印を外す（訳は対応表と同じ）

2026-10-29T04:00:34Z

英語訳の「更新が必要」の印を外す（訳は対応表と同じ）

← 古い版		2026年10月29日 (木) 13:00時点における版
2行目:		2行目:
	{{豆知識		{{豆知識
	\|番号=0021		\|番号=0021
	\|本文=~~<span class="mw-translate-fuzzy">~~Launch sites closer to the equator have an advantage. Europe launches from French Guiana in South America near the equator, and Japan put its site on Tanegashima, as far south as possible within the country.~~</span>~~		\|本文=Launch sites closer to the equator have an advantage. Europe launches from French Guiana in South America near the equator, and Japan put its site on Tanegashima, as far south as possible within the country.
	\|なぜ=Launching eastward adds the speed of the Earth's rotation (about 1,650–1,670 km/h at the equator).		\|なぜ=Launching eastward adds the speed of the Earth's rotation (about 1,650–1,670 km/h at the equator).
	\|ジャンル=科学・自然		\|ジャンル=科学・自然

MamechiAdmin: 英語訳を取り込み（pages/translations_en.json）

2026-10-29T03:58:18Z

英語訳を取り込み（pages/translations_en.json）

← 古い版		2026年10月29日 (木) 12:58時点における版
2行目:		2行目:
	{{豆知識		{{豆知識
	\|番号=0021		\|番号=0021
	\|本文=~~Launching a rocket eastward adds the speed of the Earth's rotation (about 1,650–1,670 km/h at the equator), so launch~~ sites closer to the equator have an advantage. Europe launches from French Guiana in South America near the equator, and Japan put its site on Tanegashima, as far south as possible within the country.		\|本文=<span class="mw-translate-fuzzy">Launch sites closer to the equator have an advantage. Europe launches from French Guiana in South America near the equator, and Japan put its site on Tanegashima, as far south as possible within the country.</span>
			\|なぜ=Launching eastward adds the speed of the Earth's rotation (about 1,650–1,670 km/h at the equator).
	\|ジャンル=科学・自然		\|ジャンル=科学・自然
	\|ファクト度=S		\|ファクト度=S

MamechiAdmin: 英語訳を取り込み（pages/translations_en.json）

2026-10-29T03:04:08Z

英語訳を取り込み（pages/translations_en.json）

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<languages/>
{{豆知識
|番号=0021
|本文=Launching a rocket eastward adds the speed of the Earth's rotation (about 1,650–1,670 km/h at the equator), so launch sites closer to the equator have an advantage. Europe launches from French Guiana in South America near the equator, and Japan put its site on Tanegashima, as far south as possible within the country.
|ジャンル=科学・自然
|ファクト度=S
|ファクト度の根拠=Raised from the expected A to S: primary sources (ESA and JAXA) state the rotation speed and how the site was chosen, with numbers, and the rotation speed agrees with a calculation
|ネタ度=A
|ネタ度の根拠=Interesting that Earth's rotation decides where launch sites go
|便利度=該当なし
|便利度の根拠=A fact worth knowing for its own sake
|検証ステータス=根拠あり
|根拠1URL=https://kids.esa.int/kids/en/learn/Technology/Rockets/Liftoff_from_South_America
|根拠1要約=ESA's explainer for children. Europe's spaceport is very close to the equator, giving rockets a free boost of 1,650 km/h eastward, cutting fuel and allowing heavier satellites
|根拠1格付け=一次
|根拠2URL=https://www.esa.int/Enabling_Support/Space_Transportation/Europe_s_Spaceport/Europe_s_Spaceport2
|根拠2要約=ESA, "Europe's Spaceport". Kourou lies at 5°3'N, which increases a launcher's speed by 460 m/s, saving fuel and money and prolonging satellites' life. Rotation speed at the equator is about 1,674 km/h (checked by calculation)
|根拠2格付け=一次
|根拠3URL=https://www.jaxa.jp/countdown/h2bf1/pdf/presskit_tnsc_j.pdf
|根拠3要約=JAXA document "Why Tanegashima". Eastward and southward launches must be safe in order to use the energy of Earth's rotation, and the site should be as close to the equator as possible within Japan (Tanegashima is at 31°N)
|根拠3格付け=一次
|補足=For geostationary satellites the bigger advantage is needing less fuel to correct the orbit's tilt, rather than the rotation boost itself. At Tanegashima (about 30°N) the rotation speed is about 1,440 km/h, about 230 km/h slower than at the equator (checked by calculation). The reasoning behind the site is also in the Japanese Wikipedia article on the Tanegashima Space Center, so the text is kept short.
|検証日時=2026-10-29
|検証方式=AI＋人
|本家既出チェック=本家に既出
|本家の該当ページ=https://ja.wikipedia.org/wiki/種子島宇宙センター
|派生元=体重計の数字は緯度が高いほど大きく出る
}}