¿Qué es un año luz?

The video explains how light travels at 3,000,000,000 meters per second and why astronomers use light-years to measure vast distances in space. It highlights that light takes 8.3 minutes to travel from the Sun to Earth, meaning we see events after they occur. The closest star, Proxima Centauri, is 4.2 light-years away, so its light takes 4.2 years to reach us. This illustrates how observing space is like looking back in time due to the immense distances involved.

What is the speed of light in meters per second?

How do astronomers measure distances in space?

What is the time it takes for light to travel from the Sun to the Earth?

What is the distance of Proxima Centauri from the Earth in light years?

What does it mean when we say we are looking back in time when observing space?