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Signal 23 app9/4/2023 ![]() This meter depicts the dramatic changes in readings by Voyager’s cosmic ray instrument. Note: Because Earth moves around the Sun faster than Voyager 1 or Voyager 2 is traveling from Earth, the one-way light time between Earth and each spacecraft actually decreases at certain times of the year. The elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial object. This is a real-time indicator of Voyagers' straight-line distance from the sun in astronomical units (AU) and either miles (mi) or kilometers (km). ![]() Note: Because Earth moves around the sun faster than Voyager 1 is speeding away from the inner solar system, the distance between Earth and the spacecraft actually decreases at certain times of year. This is a real-time indicator of Voyagers' distance from Earth in astronomical units (AU) and either miles (mi) or kilometers (km).
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