Read the outline
Draw the illuminated portion and the main dark regions. Record the time and the disc’s position in your surroundings.
Observe, compare,
then return.
A single region and a few notes are enough to start getting to know the Moon.
Open my lunar log →Steady your view
Sit comfortably, with your arms supported or binoculars on a mount. Compare the maria with the map. A stable instrument reveals more than a shaky image.
Follow the shadows
Start with low magnification to get your bearings. Increase it only if details remain sharp. Near the terminator, compare a crater’s wall, floor and shadow.
Choose the right time
For terrain, observe a region near the terminator. For surface contrasts and crater rays, return around full Moon. Turbulent air can make the image unstable even without clouds.
Before going out, check the weather, whether the Moon is above your horizon and the time of sunrise. A phase alone is not enough to predict visibility from your location.
The book suggests a simple experiment: draw the same crater at several phases, noting orientation and magnification.
NASA daily guide ↗Comfort and precautions
A lunar filter can make viewing more comfortable. It never protects your eyes from the Sun. For your first sessions, observe at night: never point an instrument at the Sun without appropriate solar equipment.
Objects left by human missions are too small to resolve with typical amateur instruments. Look for landscapes, not flags.
In the field
My session sheet
Fill in on paper. Compare two sessions on the same feature.
Date and time, with time zone: ___________________________________
Location and weather: ______________________________________________
Phase and orientation in the instrument: _________________________
Instrument · eyepiece · magnification: __________________________
Observed landmark: _____________________________________________
My sketch of the terrain and its shadows
What has changed since my last observation:
From book to sky
Adapted from the “La Lune” chapter of Steve Cimolino’s volume II, Comprendre comment explorer le ciel, manuscript dated 17 October 2026. The plates come from the book and have been resized for the web.
Photographs of both sides: NASA/Goddard/Arizona State University (LRO), Synchronous rotation. Annotated map: NASA photograph, Moon Phases, book annotations and approximate markers. Phase diagram: educational plate from volume II. NASA image use guidelines.
To explore further: NASA observing advice · Craters and maria · Lunar eclipses.
Discover volume II →