Streaming video compression artifacts12/4/2023 ![]() At the time of the fly-by of Neptune, in 1989, it was the outermost of the nine officially recognised planets.Transcript : Milestone: Voyager has passed through the streaming video compression artifacts that mark the edge of the solar system Trivia This is the dynamic range issue mentioned.Īrtefacts are evident in 1683: Digital Data, and mentioned in the title text of 331: Photoshops. If empty space is the darkest possible thing that can be represented-which may be the case when only 16 levels are available (see above)-then it is possible that dark matter is so dark that it cannot be represented: it would require a negative number, which is not available. The title text refers to 'our spacetime codec', suggesting a representation of reality itself as a series of ones and zeros. At time of publication Voyager was just over 150 AU from the Sun, as shown in the image.Ĭontinuing on its course at 38,000 mph, or 3.6 AU/year, Voyager will reach the outer edge of the Oort cloud, the edge of our solar system, in about 300 years. The heliosphere is 120 AU from the sun, in the direction that Voyager 1 is travelling: Voyager crossed that milestone in August 2012. The Sun is off the left side of the image by about 30 pixels, meaning that of all the planets in the solar system, only Neptune would have an orbit that is within the image at all (at the left edge). The Voyager image (and track) is overlaid in a white 'line drawing' format.Įach apparent pixel in this low-res rendering is approximately 1 AU², where 1 AU ( astronomical unit) is the distance from the Sun to the earth. It contains 16 'banded' levels from the brightest (closest zones, within this image, to the Sun) to darkest (the furthest illustrated expanses, including interstellar space), with irregular or non-trivial transitional edges but no obvious or dominant dithering/speckling or 'noise'. The 'solar system' in the snapshot appears to be a 4-bit greyscale-plane at a more pixelated level than the image given. ![]() The banding lines he has drawn are commonly seen in old images with low bit depth. Randall here is suggesting that the probe has passed the artifacts as if the artifacts were an actual feature of the solar system rather than a consequence of our technology. When images are compressed by a lossy compression format (e.g. The Voyager probe has made history for passing many milestones of our solar system. Originally designed to study the outer planets of the Solar System, it is now several decades into an extended mission beyond Neptune (see #Trivia). Voyager 1 is a space probe launched by the United States in 1977. Title text: Most of our universe consists of dark matter rendered completely undetectable by our spacetime codec's dynamic range issues.
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