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  1. How come Venus looks slightly “transparent”? When it’s on the edge of the Sun, you can distiguish two shades on Venus’s disc. See [here]( I wonder if that’s a gif artefact or something about the camera/physics of the thing.

    EDIT: at first I thought there’d be no reason for a sun shield in these images. But if it was constructed from multiple frequencies, some of which target the atmosphere, then *maybe* one or more of those included a sun shield. That might somehow show up as a different shade, although it shouldn’t.

  2. [Source] (

    “Launched on Feb. 11, 2010, the Solar Dynamics Observatory, or SDO, is the most advanced spacecraft ever designed to study the sun. During its five-year mission, it will examine the sun’s atmosphere, magnetic field and also provide a better understanding of the role the sun plays in Earth’s atmospheric chemistry and climate. SDO provides images with resolution 8 times better than high-definition television and returns more than a terabyte of data each day.

    On June 5 2012, SDO collected images of the rarest predictable solar event–the transit of Venus across the face of the sun. This event happens in pairs eight years apart that are separated from each other by 105 or 121 years. The last transit was in 2004 and the next will not happen until 2117.

    The videos and images displayed here are constructed from several wavelengths of extreme ultraviolet light and a portion of the visible spectrum. The red colored sun is the 304 angstrom ultraviolet, the golden colored sun is 171 angstrom, the magenta sun is 1700 angstrom, and the orange sun is filtered visible light. 304 and 171 show the atmosphere of the sun, which does not appear in the visible part of the spectrum.”

  3. The brightness difference when Venus comes into occlusion is so drastic that it actually gives out the illusion that the planet becomes half translucent.

  4. The source of this gif is:
    **[NASA | SDO’s Ultra-high Definition View of 2012 Venus Transit](**

    > Uploaded by [**nasaexplorer**](
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    Video length: **3:07**
    Likes/dislikes: 👍 **14531** / 👎 **298** / 💬 **3024**
    Uploaded on: **2012-06-06**

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