Luna 4 billion years ago scaled one in twenty million

This is an hypothetical repressentation of how could look the Moon during or shortly before the Late Heavy Bombardment. It was ploted using MATLAB R2016a on a gravity map of the GRAIL mission. While higher the gravity on the surface, higher the density behind it. This allows to shown the giant impact craters buried by the lava flows that formed the dark lunar maria. Although this, some craters may be formed after the Late Heavy Bombardment. During a relatively short period of time, late in terms of the formation of the Solar System, all the bodies were striked by asteroids, between 4.1 and 3.8 billion years ago (thousand of million in the long scale). The Nice model argue that the migration of the orbits of Uranus and Neptune caused the instability of the early Kuiper Belt, scattering smaller bodies inward, triggering a shower of asteroids on every body in the Solar System, including Earth. That's why every atmosphere-less object is heavily cratered, like Mercury, Vesta, Ceres, or Callisto. Bodies with adense atmosphere, like Venus, Titan, the Earth, and gas giants, remain relatively unaffected, and their craters were eroded. Other bodies, like Mars, Ganymede, Titania, Triton and Pluto, were partially resurfaced because of geologic activity.
The file's names explained: name_1_x_10_y.stl is 1 : x * 10y. So _1_6_10_7 is 1:600000000 or one in 60 million.

References
GRAIL Primary Mission Gravity MapsSurf to STL function for MATLAB

Other astronomical objects



Object


Scale [1:x]
K = 103 (thousand)M = 106 (million)G = 109 (billion)


Image




Inner Solar System



Mercury
20M, 60M,
120M



Venus
60M,
120M,
250M



Earth
60M,
120M,
250M



Luna
10M, 20M,
60M



Mars
20M, 60M,
120M



Phobos and Deimos
200K,
500K




Artificial



Salyut 7
40, 48, 80, 160




Near Earth Asteroids



Moshup and Squannit
8K,
20K,
40K



Ra-Shalom
20K,
40K



Castalia
8K,
20K,
40K



Bacchus
8K,
20K



Bennu
3K,
8K



Ryugu
3K, 8K,
20K



Geographos
40K,
80K



Phaethon
40K,
80K



Itokawa
3K,
8K



Eros
80K, 200K,
500K



Nereus
3K,
8K



Mithra
20K,
40K



Golevka
8K



Toutatis
40K,
80K




Main Asteroid Belt




Gaspra
200K



Annefrank
40K,
80K



Braille
20K,
40K



Vesta
2M, 4M,
10M



Šteins
40K,
80K,
200K



Iris
2M,
4M



Hebe
1M,
2M,
4M



Lutetia
500K, 1M,
2M



Julia
1M,
2M,
4M



Mathilde
500K,
1M



Juno
2M,
4M



Ceres
4M,
10M



Pallas
4M,
10M



Kleopatra
2M,
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