Question

how long have human beings been studying space? *
50 years
100 years
250 years
thousands of years

Explanation:

Ancient civilizations like the Babylonians and Egyptians studied the night - sky for thousands of years, tracking celestial bodies for timekeeping, agriculture, and religious purposes. Modern space exploration has more recent origins but the overall study of space by humans has a long history.

Answer:

D. thousands of years