When we look outward into space, we’re looking backward in time. That’s because light moves at the speed of light. It takes time for the light to reach us.
![](https://3c1703fe8d.site.internapcdn.net/newman/csz/news/tmb/2019/whatarelight.jpg)
Source:
https://phys.org/news/2019-08-echoes.html
Only the Autodidact is Free
When we look outward into space, we’re looking backward in time. That’s because light moves at the speed of light. It takes time for the light to reach us.
Source:
https://phys.org/news/2019-08-echoes.html