Hubble and James Webb telescopes discover 27 new objects beyond Neptune

Astronomers using the combined capabilities of the Hubble and James Webb Space Telescopes have identified 27 new trans-Neptunian objects (TNOs) at the edge of the solar system. These small, icy bodies, some measuring as little as 10 kilometers in diameter, orbit the Sun beyond Neptune.

By utilizing Hubble for visible light and Webb for infrared observations, researchers analyzed the color, composition, and orbital paths of these objects. The study revealed two distinct populations: ‘dynamically cold’ objects with circular orbits that have remained relatively preserved, and ‘dynamically hot’ objects with more inclined orbits that were likely pushed outward by gas giants during the early solar system.

Findings published in The Astronomical Journal suggest that these TNOs act as frozen remnants of the early stages of planet formation. Unexpectedly, the researchers found fewer small TNOs than current models predict, and noted that the colors of the smallest objects closely match those of much larger bodies, suggesting they have preserved chemical signatures of their origins despite potential collisions.