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The time that it takes light to reach Earth from the other planets is a function of where each planet is in its orbit. Light travels at 186,000 miles per second (300,000 km/sec), and each of the planets is moving in its own orbit.

For example, Venus almost directly between the Sun and Earth this month, so Venus is only about 40 million miles away, about 3 light-minutes.

Jupiter, on the other hand, is across the Sun from Earth, so it is over 500,000 miles away. (My Stellarium computer program tells me that Jupiter is 5.7 AU away right... NOW.) So that's 2850 seconds or 47.5 light-minutes away.

Neptune and Uranus are also at the other ends of their orbits, so they are even FURTHER away.

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16y ago

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