JTC-1644
Mare Tranquillitatis
Less than 200 kilometres from Tranquility Base, where Apollo 11 set down in July 1969. The same dark basalt that took the first human footprint.
- Coordinates
- 2.40° N, 25.80° E
- Diameter
- 3.9 km
Schematic elevation, rendered from catalogue data. Sunlight from the west.
Mare Frigoris
55.80° N, 3.20° E
In the Sea of Cold, a long narrow band of dark lava stretching almost a third of the way around the northern Moon.
High northern latitude means permanently oblique lighting and long, dramatic shadows.
The bright, ancient uplands. Rougher country, more dramatic in a telescope.
Dedication
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The Moon keeps one face turned toward Earth, so your crater is fixed in the same spot of sky every clear night of your life.
JTC-2140 lies at 55.80° N, 3.20° E, in Mare Frigoris. On the map, north is up and east is to the right, exactly as it appears through a telescope from the high desert.

Mare Tranquillitatis
Less than 200 kilometres from Tranquility Base, where Apollo 11 set down in July 1969. The same dark basalt that took the first human footprint.
Mare Crisium
Inside the Sea of Crises, a perfectly isolated oval ringed by mountains and the easiest lunar sea to pick out with the naked eye.
Mare Serenitatis
Where the Sea of Serenity meets the highlands, on ground that has been struck, flooded by lava, and struck again.