Àdàkọ:POTD/2007-07-17
| Àwòrán Ọjọ́ Òní | |
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An image of the top layers of Earth's atmosphere leading to outer space. Atmospheric gases scatter blue wavelengths of visible light more than other wavelengths, giving the Earth’s visible edge a blue halo. At higher and higher altitudes, the atmosphere becomes so thin that it essentially ceases to exist. Gradually, the atmospheric halo fades into the blackness of space. Photo credit: NASA Johnson Space Center |