Question

what do scientists use to describe a constellation? (1 point) its boundary its brightest star its story in greek mythology its star pattern

Explanation:

Scientists use the star - pattern to describe a constellation. A constellation is defined by the recognizable pattern of stars in the sky. Boundaries are used for demarcating constellations in the celestial sphere but not for description in the most common sense. The brightest star doesn't fully describe a constellation. Greek mythology stories are cultural associations, not scientific ways of description.

Answer:

its star pattern