How we determine what lies light years away
How we determine what lies light years away A blog on the universe and the cosmos above and the nature of it determined by great scientists. The simple answer as to how we can see light years away from us is using reflection of light and radio telescopes. The light emitted by various stars or the one released at the time of big bang gets reflected when it crashes into any object. When this reflected light reaches earth, its radiations are detected by Radio telescopes and an estimate of the object's distance from earth is then calculated . credit : Wikimedia commons The concept of light year Reflection and Radio telescopes Science behind the Recent discoveries The concept of Light year : The space is unimaginably vast. On earth, we use units like meters and Kilometers to measure distances. But on a vast scale like space, considering the same units is not much helpful. Units like kilometers and meters are sufficient to measur