Materials used, etc.

Photo by Malcolm Lightbody on Unsplash
Photo by Jon Tyson on Unsplash
Photo by Ashni on Unsplash
Photo by NASA on Unsplash
Photo by Gavin Allanwood on Unsplash
Photo by Veri Ivanova on Unsplash
Photo by Mina Stankovic on Unsplash
Photo by Franki Chamaki on Unsplash
https://icooon-mono.com/about-icoon-mono/
https://freephotomuscle.com/