cosmologist
🇺🇸
/kɑːzˈmɑːlədʒɪst/
🇬🇧
/kɒzˈmɒlədʒɪst/
A person who studies the universe, its beginnings, and how it has changed over time.
The cosmologist gave a fascinating lecture about the formation of galaxies.
宇宙学者が銀河の形成についての魅力的な講演を行いました。