날개도 없는 열기구. 하늘을 나는 원리 열기구.

날개없이 하늘을 날 수 있는 열기구.
어떻게 하늘을 날 수 있을까요???
열기구를 처음 만든 사람은???

#열기구#몽골피에#루이16세#다빈치노트#과학채널#지식채널

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File:Ludvig XVI av Frankrike porträtterad av AF Callet.jpg
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File:Pilatre de Rozier.jpg
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File:Joseph-montgolfier.jpg
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File:Jacques-Étienne Montgolfier.jpg
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File:Montgolfier brothers flight.jpg
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