지구와 우주의 경계를 고도 100km로 정한 이유

<div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin" data-link="http://cafe.daum.net/subdued20club/ReHf" data-link-newwindow="_blank"><a href="http://cafe.daum.net/subdued20club/ReHf" target="_blank" class="ke-link"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/db3bc991cc811264a000cb9ff8aa909ffe0048c9" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/db3bc991cc811264a000cb9ff8aa909ffe0048c9" data-origin-width="474" data-origin-height="227"></a></div><p style="text-align: center;">출처 : 여성시대 슈가글라이더</p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/1cc4feb94baf0bd12eb522678e6a0985720287db" class="txc-image" 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data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/e75344982021183146ce29f7e774925836131795" data-origin-width="700" data-origin-height="393"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/721f0e31614af2944b321fcfc0f06bd492e18e88" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/721f0e31614af2944b321fcfc0f06bd492e18e88" data-origin-width="700" data-origin-height="393"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/b5871e260a42df4b0d049c14b0a37b6bcdd4f5cf" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/b5871e260a42df4b0d049c14b0a37b6bcdd4f5cf" data-origin-width="700" data-origin-height="393"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/6e69e5411bbbbcf9df3099abaf1fb64ece8e232e" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/6e69e5411bbbbcf9df3099abaf1fb64ece8e232e" data-origin-width="700" data-origin-height="393"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/fc1768e1cdb8a5eb6e10b6480bdedeefd2229c12" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/fc1768e1cdb8a5eb6e10b6480bdedeefd2229c12" data-origin-width="700" data-origin-height="393"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/0f85bd8f4fa643749fddf7f2d7f7b82ce15c86b6" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/0f85bd8f4fa643749fddf7f2d7f7b82ce15c86b6" data-origin-width="700" data-origin-height="393"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/b1bda8a698241df138af4c8dd9e36b883de705a7" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/b1bda8a698241df138af4c8dd9e36b883de705a7" data-origin-width="700" data-origin-height="393"></div><p style="text-align: center;"> </p><p style="text-align: center;">이정도면 그냥 너네도 미터법 써라 미국 새뀌덜아</p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"><a href="https://youtu.be/hvQIYaczSX4" target="_blank" class="ke-link">https://youtu.be/hvQIYaczSX4</a></p><div class="figure-video" data-ke-type="video" data-video-url="https://www.youtube.com/watch?v=hvQIYaczSX4" data-video-host="youtube" data-video-play-service="daum_cafe" data-video-width="480" data-video-height="360" data-ke-style="alignCenter" data-video-thumbnail="https://scrap.kakaocdn.net/dn/bbunkC/hySBuUmQCF/9rYEDn3KSqidOk0qb6TJwk/img.jpg?width=480&height=360&face=9_77_388_198" data-ke-mobile-mobilestyle="widthContent" data-video-origin-width="480" data-video-origin-height="360"><iframe src="https://www.youtube.com/embed/hvQIYaczSX4" width="480" height="360" frameborder="0" scrolling="no" allowfullscreen=""></iframe><div class="figcaption"></div></div><p style="text-align: center;"> </p><p style="text-align: center;"> </p><p style="text-align: center;"> </p>