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Field Notes · Our Neighbour

Anatomy of the Moon

Our nearest neighbour, just over a light-second away — captured on the Unistellar Odyssey

The waxing gibbous Moon, lit from the left, with dark maria, bright craters, ray systems and a relief-rich terminator on the right.1 2 3 4
Best seen along the terminator, where the light strikes sideways

What you're seeing

1

The TerminatorDay meets night

The line between lit and dark. Here the sunlight strikes sideways, so every crater and mountain throws a long shadow — it’s where the surface looks most three-dimensional.

2

The MariaAncient lava seas

The smooth, dark patches are vast plains of solidified lava. Early astronomers thought they were oceans, so we still call them “seas”.

3

The CratersImpact scars

Round basins blasted out by impacts, some billions of years old. With no air or weather to erode them, the Moon keeps a near-perfect record of every strike.

4

The RaysFresh ejecta

The bright streaks fanning out from younger craters are debris flung across the surface by the impact — the freshest scars on an ancient face.

~384,000 km
Distance away
1.3 seconds
At the speed of light
One face
Always toward us