The closeness of the starry sky is a subjective feeling, and after the subjective feeling, there are indeed objective reasons. Since ancient times, no one will use the words within reach to describe the starry sky in the city, right? Because the city lights dim the starry sky. Mountain areas are not a good location for cities, and relative light pollution will make the starry sky brighter. In addition, in areas with higher altitudes, the air is thin and fog is not easy to appear. Many times, I watched the sunrise in Tianhuangping. Although the fog in the valley in the morning is hazy and romantic, it is not good for looking up at the stars.
Of course, subjective feelings must have a subjective role. The most famous poem is "He knows that the dew will be frost tonight, and how bright the moonlight is at home!" Du Fu wrote it in Remembering Brothers on a Moonlit Night. Scientifically speaking, this statement is obviously not worth refuting, but the author is using this illusion to write a thought cut-in, which is plain but steep and achieves a very high artistic effect. Similarly, looking up at the starry sky at the top of the mountain will also devote more time and attention. Under the long-term gaze, the starry sky is close to the soul and naturally appears.