The time it takes for light to travel from one star to another depends on the distance between the stars. The speed of light in a vacuum is approximately 299,792 kilometers per second (km/s) or about 186,282 miles per second (mi/s).
To calculate the time it takes for light to travel between two stars, you can use the formula:
Time (in seconds) = Distance (in kilometers) / Speed of light (in kilometers per second)
For example, let's consider two stars that are 10 light-years apart:
Distance = 10 light-years = 10 * (number of seconds in a year) * (speed of light) ≈ 10 * 365.25 * 24 * 60 * 60 seconds ≈ 9.461 trillion kilometers
Time ≈ 9.461 trillion kilometers / 299,792 km/s ≈ 31,546 seconds ≈ 8.76 hours
So, it would take about 8.76 hours for light to travel from one star to another if they are 10 light-years apart.
Keep in mind that the distances between stars in the universe can vary significantly, and the time it takes for light to travel between them will depend on their specific separation.