Answer:
star
Step-by-step explanation:
The root word “astro-” comes from Greek and it means star or celestial body. It is found in many words like “Astronomy” (the science that studies celestial bodies), “Astrology” (the study of celestial bodies and their influence on human affairs or destiny), “Astrophotography” (The photography of celestial objects and events), and “Astrometry” (The study of measurements of the positions and motions of the heavenly bodies).