Adam C. Schneider

Using Webb, astronomers peered into the atmosphere of the brown dwarf Wolf 1130C and found phosphine — a gas familiar from Jupiter. Its abundance is ten times higher than expected, pointing to vigorous mixing of layers, like in a planetary mixer. Now the boundary between giant planets and brown dwar

Astronomers analyzed data on the orphan planet WISE 0855 — a dim, cold ball not far away. For 11 hours, Webb watched its light, trying to spot the shadow of a moon. No direct discovery happened, but the method proved its worth. If many rogue planets have Titan-sized moons, we will soon find them.