The moon is situated 100,000 yojanas above the rays of the sunshine. Day and night on the heavenly planets and Pitrloka are calculated according to its waning and waxing. Above the moon by a distance of 200,000 yojanas are some stars, and above these stars is Sukra-graha (Venus), whose influence is always auspicious for the inhabitants of the entire universe.

Above Sukra-graha by 200,000 yojanas is Budha-graha (Mercury), whose influence is sometimes auspicious and sometimes inauspicious. Next, above Budha-graha by 200,000 yojanas, is Angaraka (Mars), which almost always has an unfavorable influence. Above Angaraka by another 200,000 yojanas is the planet called Brhaspati-graha (Jupiter), which is always very favorable for qualified brahmanas. Above Brhaspati-graha is the planet Sanaiscara (Saturn), which is very inauspicious, and above Saturn is a group of seven stars occupied by great saintly persons who are always thinking of the welfare of the entire universe. These seven stars circumambulate Dhruvaloka, which is the residence of Lord Visnu within this universe.

Srimad-Bhagavatam Introduction to Chapter 5
A.C. Bhaktivedanta Swami Prabhupada
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Above the rays of the sunshine by a distance of 100,000 yojanas [800,000 miles] is the moon, which travels at a speed faster than that of the sun. In two lunar fortnights the moon travels through the equivalent of a samvatsara of the sun, in two and a quarter days it passes through a month of the sun, and in one day it passes through a fortnight of the sun.

Purport
When we take into account that the moon is 100,000 yojanas, or 800,000 miles, above the rays of the sunshine, it is very surprising that the modern excursions to the moon could be possible. Since the moon is so distant, how space vehicles could go there is a doubtful mystery. Modern scientific calculations are subject to one change after another, and therefore they are uncertain. We have to accept the calculations of the Vedic literature. These Vedic calculations are steady; the astronomical calculations made long ago and recorded in the Vedic literature are correct even now. Whether the Vedic calculations or modern ones are better may remain a mystery for others, but as far as we are concerned, we accept the Vedic calculations to be correct.

Srimad-Bhagavatam 5.22.8
A.C. Bhaktivedanta Swami Prabhupada