A real-life deluminator for spotting exoplanets by reflected starlight

Perhaps you remember the opening scene of “Harry Potter and the Sorcerer’s Stone” that took place on Privet Drive. A bearded man pulled a mysterious device, called a deluminator, from his dark robe and one by one the lights from the street lamps flew into it.

Source:
https://phys.org/news/2019-12-real-life-deluminator-exoplanets-starlight.html