David Rapetti

Two planets around the star TOI-4495 perform a stumbling dance: while the inner one completes two laps, the outer manages just one. But the rhythm is off — the inner planet speeds up and slows down, like a partner stumbling in her steps. Using the transit method, watching as the planets briefly dim the star's light, astronomers weighed these worlds.

A ball, almost weightless for its size, circles its star every four days. Planet TOI-2195 A b is a real riddle: by mass it's slightly heavier than Neptune, yet bloated to Jovian volumes. If there were an ocean big enough, this exoplanet would float on its surface like a giant inflatable ball.