Seeing Red : 無料・フリー素材/写真
Seeing Red / NASA Goddard Photo and Video
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | NASA image captured September 26, 2011Many aurora appear green, but sometimes — as in this image from the International Space Station — other colors such as red can appear. The colors depend on which atoms are causing the splash of light seen in the aurora. In most cases, the light comes when a charged particle sweeps in from the solar wind and collides with an oxygen atom in Earth’s atmosphere. This produces a green photon, so most aurora appear green. However, lower-energy oxygen collisions as well as collisions with nitrogen atoms can produce red photons -- so sometimes aurora also show a red band as seen here. Karen FoxNASA's Goddard Space Flight CenterCredit: NASANASA image use policy.NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.Follow us on TwitterLike us on FacebookFind us on Instagram |
| 撮影日 | 2011-09-18 11:55:14 |
| 撮影者 | NASA Goddard Photo and Video , Greenbelt, MD, USA |
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| カメラ | NIKON D3S , NIKON CORPORATION |
| 露出 | f/2.8 |
| 開放F値 | f/2.8 |
| 焦点距離 | 20 mm |