I wonder if the stars were brighter in the painting when it was new or if they come across more strongly in person or something… It would be an awful lot of effort to make such an accurate night sky and then not make it visible.
And if the comet is what the painting is celebrating, why not make that brighter too?
From the article:
“The researchers trained 14 sighted and 12 blind people for between two and three hours twice a week over 10 weeks. They started by teaching participants to produce mouth clicks, then trained them on three tasks. The first two involved judging the size or orientation of objects. The third involved navigating virtual mazes, which participants moved through with the help of simulated click-plus-echo sounds tied to their positions.”