Cách sử dụng
The word 'planetary' refers to something that is related to planets, which are large celestial bodies that orbit around a star. For example, we can say that the planetary system consists of various planets that revolve around the sun. Another example would be that planetary science is a branch of science that studies planets and their characteristics. The word 'planetary' can also be used to describe something that affects or involves a wide range of people or things, just like how climate change is a planetary issue.