Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2017 August 5 Explanation: Albert Einstein's general theory of relativity, published over 100 years ago, predicted the phenomenon of gravitational lensing. And that's what gives these distant galaxie
![APOD: 2017 August 5 - Gravity's Grin](https://cdn-ak-scissors.b.st-hatena.com/image/square/365b458d95851a09e8175f3eb0f7d53bd90dbcdc/height=288;version=1;width=512/https%3A%2F%2Fapod.nasa.gov%2Fapod%2Fimage%2F1708%2Fcheshirecat_chandra_comp1024c.jpg)