[:ja]金井宣茂宇宙飛行士がISSから撮影した地球とオリオン座です。ISSには天頂方向に窓がなく、地球側の窓から見るので、地平線が必ず見えるようになっています。
ちなみに、オリオン座はギリシャ神話に登場する、海神ポセイドーンの子の狩人ですが、中央の三つ星を中心に明るい星が多く有名な星座です。シリウスはベルトのラインを南東へ拡張することによって見つかり、ベテルギウスとプロキオンの3つの1等星で、冬の大三角を形成します。
参考文献： Norishige Kanai’s Tweet
ウェブ地球儀で地球俯瞰画像を見る： LiVEARTH
[Earthview Wonders] No.467: The Orion from ISS
Astronaut Norishige Kanai captured from ISS the beautiful constellation of Orion. ISS has no window on the backside from Earth and all the photos of night sky comes with the Earth’s horizon.
Orion is a prominent constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous and recognizable constellations in the night sky. It was named after Orion, a hunter in Greek mythology. Its brightest stars are Rigel and Betelgeuse, a blue-white and a red supergiant, respectively.[:en][Earthview Wonders] No.467: The Orion from ISS
Astronaut Norishige Kanai captured from ISS the beautiful constellation of Orion. ISS has no window on the backside from Earth and all the photos of night sky comes with the Earth’s horizon.
Orion is a prominent constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous and recognizable constellations in the night sky. It was named after Orion, a hunter in Greek mythology. Its brightest stars are Rigel and Betelgeuse, a blue-white and a red supergiant, respectively.[:]