1. a scientist who studies the origin, structure, and evolution of the universe

Examples

• The cosmologist presented new evidence about the Big Bang theory.
• Many cosmologists believe the universe is still expanding.
• She became a cosmologist after studying physics and astronomy in graduate school.
• Cosmologists use telescopes and mathematical models to understand distant galaxies.
• The renowned cosmologist published a groundbreaking paper on dark matter.
• Cosmologists work to answer fundamental questions about how the universe began.