Pluto is located at an average distance of about 5.9 billion kilometers (3.7 billion miles) from Earth. The speed of light in a vacuum is approximately 299,792 kilometers per second (186,282 miles per second). Using these values, we can calculate the time it takes for light to travel from Earth to Pluto.
The time it takes for light to travel a certain distance can be calculated by dividing the distance by the speed of light. In this case, the distance between Earth and Pluto is roughly 5.9 billion kilometers. So, the time it takes for light to travel from Earth to Pluto would be:
Time = Distance / Speed of light = 5.9 billion kilometers / 299,792 kilometers per second ≈ 19,667 seconds.
Converting this to years, we can divide the number of seconds by the number of seconds in a year (approximately 31,536,000 seconds):
Time ≈ 19,667 seconds / 31,536,000 seconds per year ≈ 0.624 years.
Therefore, if you were looking at Earth from Pluto, you would be observing Earth's light with a delay of approximately 0.624 years. In other words, you would see Earth as it was about 0.624 years ago.