Kepler has found thousands of planets, but it’s done it all with fairly simplistic technology: a photometer that images each star as a few pixels and waits for the light to change in those pictures, signalling a planet moving across.

NASA has turned the little photometer that could toward TRAPPIST-1, the system of seven planets around a star only a hair bigger than Jupiter. The idea was to gain a better understanding of the TRAPPIST system and to look for more planets, if any are to be found.