Named 2017 OF201, the newly-discovered trans-Neptunian object is one of the most distant visible objects in our Solar System and is likely large (about 700 km in diameter) enough to qualify as a dwarf planet. Cutout images of all 19 detections of 2017 OF201. Image credit: Cheng et al., arXiv: 2505.15806. Trans-Neptunian objects (TNOs) are minor planets that orbit the Sun at a greater average distance than the orbit of Neptune. After 30 years of the...
