Einstein in action
A regular spiral galaxy, visually warped though gravitational lensing.
Pretty cool to be able to see how radically space time is being warped as Einstein figured out it would be in the presence of a significantly large mass.
Snip taken from here:
[url=https://flic.kr/p/JgXyyb][img][/img][/url][url=https://flic.kr/p/JgXyyb]Gravitational Lensing in Galaxy Cluster Abell 370[/url] by [url=https://www.flickr.com/photos/nasahubble/]NASA Hubble Space Telescope[/url], on Flickr
Wow, that is the most extreme example I have ever seen.