And how did Romanova actually shoot these? I emailed her to ask. She wrote back,
In most of times I stayed with people at night and photographed them early in the morning, around 6 am, there was a home ladder that I slowly climbed with my camera on the tripod. I used the 10 seconds delayed shutter and just hold it in my hands. This is a long process, where I take only few images (around 10, maybe) in 1 hour, trying not to make noise.