The constellation Sagittarius is located approximately 2.5 million light-years away from Earth. This is a vast distance, and light traveling at the speed of 299,792,458 meters per second would take approximately 2.5 million years to reach us from Sagittarius. In astronomical terms, this means that the light we see from Sagittarius today left that region of the universe 2.5 million years ago and has been traveling through space ever since. It's important to remember that the universe is constantly expanding, and the actual distance to Sagittarius may have changed since the light began its journey millions of years ago. Nevertheless, this figure of 2.5 million light-years provides us with a sense of the immense scale of the universe and the vast cosmic neighborhood that surrounds our planet.