Question

the transit of venus occurs when the planet passes directly between earth and the sun. this phenomenon happens only twice within a roughly 100 - year span, but those two times are just eight years apart. stargazers and amateur cosmologists enjoy watching the planet cross the suns disk, but the transit once carried a weightier significance. astronomers breathlessly anticipated the same event in the 1700s. following advances in mathematics, it presented an opportunity to accurately measure earths distance from the sun. at the time, this was needed to unlock many other mysteries of the solar system. the transit had great value. ethical moral legal scientific

Explanation:

The transit of Venus allowed astronomers to measure Earth - Sun distance, which was crucial for understanding the solar system. This is a scientific application. Ethical, moral, and legal values are not relevant here.

Answer:

D. scientific