The light itself is not "there" anymore.
* Light travels at the speed of light: This is the fastest speed anything can travel in the universe. It takes time for light to cross vast distances.
* Light is a wave: Light behaves like a wave, and waves don't have a permanent location. They propagate, or move, through space.
* The source may be gone: The star that emitted the light may have already burned out, exploded, or moved to a different location. Even though its light is reaching us now, the star itself might be long gone.
What we see is a "snapshot" in time:
* We see the star as it was: When we look at a distant star, we are seeing the light that left that star millions or billions of years ago. It's like looking at a photo of someone from their childhood – they've changed since then, but the photo captures them at that moment in time.
* The light carries information: The light we see from a star tells us about its temperature, composition, and even its motion. We can learn about the universe by studying the light from distant objects, even though that light was emitted long ago.
In summary: The light from a star is not "there" anymore in the sense that it doesn't remain at the same point in space. It has already traveled a vast distance to reach us, and the star that emitted it may no longer exist. However, the light still carries information about the star at the moment it was emitted, allowing us to study the universe and its history.
