Original post here.
Bonus Image Provenance: I commissioned Bacchus at ErosBlog to research this image further, and he has come up with the following additional details.
The source information in the tumblr stream leads back to this “Retro-Futurism” Russian-language LiveJournal, which is I think relevant to your interests:
The specific source post for your image is here:
The comments on that post source the image to Carlos Valenzuela (*Valzonline) on DeviantArt, where the image is titled “Cosmic Thrills”:
http://fc05.deviantart.net/fs71/f/2010/300/2/5/2591d6159f95df6325b8334436b4d899-d31mk73.jpg (larger 692x1200px version)
Valenzuela seems to do a lot of fictitious retro movie posters and pulp magazine covers:
He has more information and another gallery online here:
Bacchus is actively taking image research commissions, and if you have adult imagery you’re curious to learn more about, I encourage you to visit Bacchus’s introductory post for his image-searching service, where you can find details about how to commission him.