UPDATE 21/11/18: In case you had any doubt of its veracity, Hello Games has confirmed that No Man's Sky's previously leaked Visions update is indeed a thing that is coming. And, better yet, it's a thing that's coming tomorrow, Thursday 22nd November, on PC, Xbox One, and PS4.
Based on Hello Games' announcement, there's not a lot to add that wasn't already in yesterday's leaked trailer. However, it's well worth changing out the official Visions patch notes on the No Man's Sky website, as they contain a huge number of screenshots, and some more granular detail, illustrating the increased variety that tomorrow's update will bring.
ORIGINAL STORY 20/11/18: Visions, a big new update for Hello Games' interplanetary exploration adventure No Man's Sky, has been inadvertently revealed after fans discovered an unlisted new trailer on the developer's official YouTube channel.