Question

あや

訳教えてください🙇‍♀️

No one knew for sure. Scientists developed many different theories, or guesses, but they could not
prove that their ideas were correct.
Then, between 1969 and 1972, the United States sent astronauts to the moon.
They studied the moon and returned to Earth with rock samples.
Scientists have studied these pieces of rock, the moon's movements, and information about the
moon and the Earth.