While many images of space are artist renderings, this video is based on direct images of a star and its four planets.
. According to Northwestern University, the planet closest to the star takes about 45 Earth years to complete one orbit, whereas one revolution for the farthest planet takes nearly 500 years.
Wang condensed the 12 years of data into a 4.5-second time-lapse, making the planetary orbits easier to see for human eyes. For example, the Earth’s atmosphere caused blurring in the image, so Wang had to use technology called "adaptive optics" to correct the image. He also had to suppress the glare from HR8799. The star was so bright in the images and made seeing the orbiting planets difficult, so a black circle was placed in the middle of the images – where the star is located – so the planets may be more visible.
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