Select the option that can be used as a one-word substitute for the given group of words.

A group of stars

Constellation

The option that can be used as a one-word substitute for "a group of stars" is constellation.

• Astronomy is the scientific study of celestial objects, such as stars, planets, and galaxies.
• Constellation is a group of stars that appear to form a recognizable pattern in the night sky.
• Congregation is a gathering of people, especially for religious worship.
• Planets are celestial bodies that orbit a star.

Constellation is the most appropriate word for the given group of words because it specifically refers to a group of stars that appear to form a recognizable pattern. It is derived from the Latin words constellare, meaning "to place together in a starry figure."