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The photograph depicts a lush green rolling hill with cirrus clouds during a daytime sky, with mountains far in the background. [ 1 ] [ 2 ] It was taken by Charles O'Rear , a former National Geographic photographer and resident of St. Helena , California, in the Napa Valley region north of San Francisco, while on his way to visit his girlfriend ...
In the lower part of this wide field image the distinct blue eyed Blue Horsehead Nebula can be seen. The blue area at the back of the head is IC 4601. The cloud in the top left corner is LBN 1093 and Sh2-1 with the bright star being Pi Scorpii and the yellowish cloud in the middle on the left being Sh2-7 with Dschubba at its center.
Star-painted ceilings were found in the tomb of Yintun located in Luoyang. The mural is located in the central tomb chamber and is painted on a domed ceiling. [26] Unlike the common depiction of pointed gold stars on a blue background, the stars painted in the tomb are circular and vary in colour from white to orange. [26]
Fine dust in the nebula reflects the light. The blue color is caused not only by Rigel's blue color but because the dust grains reflect blue light more efficiently than red. In astronomy, reflection nebulae are clouds of interstellar dust which might reflect the light of a nearby star or stars.
Star system Nebula Median distance Stars in system Spectral type Apparent magnitude (V) Comments and references P Cygni (34 Cygni) 5251±180: 1: B1-2 Ia-0ep: 4.82: The closest luminous blue variable star to Earth V4029 Sagittarii (HD 168607) 6,000 1 B9Ia + 8.12 to 8.29 [4] [5] near the Omega Nebula: V905 Scorpii (HD 160529) 6,100 1 LBV 6.66 [4] [5]
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As a result, the cloud base can vary from a very light to very dark grey depending on the cloud's thickness and how much light is being reflected or transmitted back to the observer. Thin clouds may look white or appear to have acquired the color of their environment or background. High tropospheric and non-tropospheric clouds appear mostly ...
Paranal Observatory nights. [3] The concept of noctcaelador tackles the aesthetic perception of the night sky. [4]Depending on local sky cloud cover, pollution, humidity, and light pollution levels, the stars visible to the unaided naked eye appear as hundreds, thousands or tens of thousands of white pinpoints of light in an otherwise near black sky together with some faint nebulae or clouds ...