astronomical
🇺🇸
/ˌæstrəˈnɑːmɪkl/
🇬🇧
/ˌæstrəˈnɒmɪkl/
related to the study of stars and space
The telescope is used for astronomical research to study distant stars.
extremely large in amount or size
The cost of building the new stadium was astronomical, reaching billions of dollars.