[:ja]ランディ・ブレズニク宇宙飛行士がISSから撮影した月の出です。大気の青色が圧巻です。

Credit: Randy Bresnik, NASA

大気圏と宇宙空間との境界は、何を基準に考えるかによって幅がありますが、便宜的に地表から概ね500km以下が地球大気圏であるとされます。大気は、温度(気温)変化を基準にして、鉛直方向に四つの層に区分されており、これを「地球大気の鉛直構造」といいます。

対流圏: 0 – 9/17km。高度とともに気温が低下。さまざまな気象現象が起こります
成層圏: 9/17 – 50km。高度とともに気温が上昇。オゾン層が存在
中間圏: 50 – 80km。高度とともに気温が低下
熱圏: 80 – 約800km。高度とともに気温が上昇。外気圏との境界は熱圏界面

参考文献: Randy Bresnik’s Tweet
ウェブ地球儀で地球俯瞰画像を見る: LiVEARTH

[Earthview Wonders] No.309: Moon Rise

Astronaut Randy Bresnik captured from ISS breathtaking Moon rise. Blue color of the atmosphere is also stunning.

Credit: Randy Bresnik, NASA

For convenience, altitude lower than 500km is considered Earth’s atmosphere in general. Earth’s atmosphere consists of a number of layers that differ in properties such as composition, temperature and pressure.

Troposphere: 0-17km. extends from the surface to the bottom of the stratosphere
Stratosphere: 17-50km. contains the ozone layer
Mesosphere: 50-80km. wherein most meteors burn up
Thermosphere: 80-800km. temperature increases with altitude

Reference: Randy Bresnik’s Tweet
See earthview photo gallery with web-globe: LiVEARTH[:en][Earthview Wonders] No.309: Moon Rise

Astronaut Randy Bresnik captured from ISS breathtaking Moon rise. Blue color of the atmosphere is also stunning.

Credit: Randy Bresnik, NASA

For convenience, altitude lower than 500km is considered Earth’s atmosphere in general. Earth’s atmosphere consists of a number of layers that differ in properties such as composition, temperature and pressure.

Troposphere: 0-17km. extends from the surface to the bottom of the stratosphere
Stratosphere: 17-50km. contains the ozone layer
Mesosphere: 50-80km. wherein most meteors burn up
Thermosphere: 80-800km. temperature increases with altitude

Reference: Randy Bresnik’s Tweet
See earthview photo gallery with web-globe: LiVEARTH[:]