Comment by BalinKing

It's an HDR image, I think.[0] At the moment, only some browsers show it as brighter—Firefox on macOS, for example, doesn't support HDR images and I had to open the page in Safari to see it for myself.

[0] see, for example, this submission from the front page a month ago: https://news.ycombinator.com/item?id=49402521.