![[Aggregator] Downloaded image for imported item #64848](https://astrobitica.com/wp-content/uploads/2026/06/NASAs_TESS_Mission_Reveals_the_Puffiest_Planets_Ever_Found_TOI-791_20260629_062529.jpg)
Astronomers have discovered two of the lightest worlds ever found, giant planets less dense than candy floss, roughly the size of Jupiter but containing almost nothing inside. They orbit the same distant star in a gravitational dance that affects their orbital timing, with observations made during the Antarctic winter helping to reveal their surprisingly low density.
Astronomers have found two of the lightest worlds ever discovered, a pair of giant planets so wispy that, gram for gram, they are less dense than candy floss. Each is roughly the size of Jupiter yet holds almost nothing inside and the two circle the same distant star as siblings, locked in a gravitational dance that sees them tug one another off schedule as they orbit. It was observations from the depths of the Antarctic winter, that let astronomers weigh them and uncover just how astonishingly insubstantial they are. Now they want to know just how a planet ends up barely heavier than air at all.
About the Author
