Scientists have used NASA's Hubble and James Webb Space Telescopes to study trans-Neptunian objects (TNOs), which are icy bodies that orbit the sun far beyond Neptune. These objects are among the most distant and faint in our solar system, often too dim to be seen without powerful telescopes. A new study published in The Astronomical Journal examined 27 newly discovered TNOs, focusing on their color, composition, and size. These objects are typically small, with most being over 100 million times dimmer than the faintest stars visible to the naked eye. The research found that the colors of these small TNOs align with those of larger TNOs, suggesting that their surfaces have not been significantly altered by collisions. This could mean either that collisions are less frequent than expected or that these objects have retained their original compositions from the early solar system. The scientists observed two types of TNOs: "cold" ones with circular orbits, and "hot" ones with more elliptical orbits. The "hot" TNOs were likely pushed outward when the gas giants in our solar system migrated, yet they still show signs of their original formation locations. The study also found that the size distributions of both types of TNOs were surprisingly similar. This suggests that the processes that form these small icy bodies are not strongly affected by the conditions in the region where they formed. However, the researchers noted a puzzling lack of very small TNOs compared to some theoretical models. This discrepancy could hint at unknown factors influencing how these objects form or evolve. Webb's observations identified 27 new TNOs, including one so faint that it would be like spotting a small swarm of fireflies on the moon from Earth. The smallest of these objects has a diameter of about 3 miles (5 kilometers), which is five times smaller than what ground-based telescopes can usually detect. The combined power of Hubble and Webb was essential for this study, with Hubble capturing visible light and Webb providing critical infrared data. This collaboration has opened a new window into the distant reaches of our solar system, offering insights into the early history of planet formation.