In space, Light travels at a speed of 299,792,46 km a second or 1,079,252,956 km an hour. When we look at even the nearest star, we see light that left it more than four years ago. Here are the times it takes light to reach Earth from various bodies in space.
Light years
A light year measures distance, not time. Distance in space are often described as light years. The distance light travels in a year.
Moon 1.26 seconds.
Sun 8 minutes 17 seconds.
Furthest planet (Neptune) 4 hours 21 minutes when the planet is at its
maximum distance from Earth.
Nearest star 4.22 years distance at which the Sun would no longer be visible to the naked eye 60 years.
Most distant star in our galaxy 62,700 years.
From nearest body outside our galaxy 174,000 years.
Furthest visible star 2,309,000 years.
Most distant known quasar 14,000,000,000 years.
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