Space
ECLIPSE
An eclipse occurs when one celestial body passes into the shadow of another, hiding it from view. A solar eclipse happens when the Moon blocks the Sun, while a lunar eclipse occurs when Earth's shadow falls on the Moon. The word comes from the Greek 'ekleipsis', meaning 'abandonment'.
ECLIPSE 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.