Space
COMET
A comet is an icy body that releases gas and dust, forming a glowing coma and tail when it nears the Sun. Halley's Comet is the most famous, returning roughly every 76 years. The word comes from the Greek 'kometes', meaning 'long-haired star'.
COMET is the kind of word that shows up in themed word searches like Strands. Themed puzzles group words like this under a shared category — here, Space.