THE PHYSICAL EDITION
Moon and Mornings
Vince wants to draw the Moon. His notebook follows a faint circle, passing clouds, a changing place in the sky and different bright shapes across nights and mornings. Look closely together and compare the pictures he keeps.
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Looking and recordingPages 1–2
Vince pauses with his pencil and notebook to look at a bright curved part of the Moon. Sunlight makes the crescent bright. A drawing can keep the shape he notices at this particular time.
Ask together: What shape is Vince trying to draw?
Earthshine and the whole MoonPages 3–4
A closer sky view reveals a faint round part beside the much brighter crescent. Sometimes sunlight reflected from Earth makes the rest of the Moon faintly visible. This earthshine is easier to notice in some twilight conditions than others.
Ask together: What can you notice beyond the bright curve?
Clouds and visibilityPages 5–6
A thick cloud hides the Moon; a gap reveals the crescent again while Vince waits. An opaque cloud can block our view. Its passing does not change the Moon’s monthly phase.
Ask together: What changes between these two pictures?
Comparing with a fixed landmarkPages 7–8
In two views from the same spot, the crescent appears lower and farther across the tree as the evening goes on. Earth’s turning makes the Moon appear to travel across the sky. A fixed tree or roof helps us compare its position.
Ask together: Where is the Moon compared with the tree each time?
Changes across nightsPages 9–10
Several nights later, Vince compares his earlier crescent drawing with a Moon whose right half looks bright. The Moon itself has not grown. As it travels around Earth, we see different amounts of its sunlit half.
Ask together: How does the bright part compare with Vince’s earlier drawing?
Watching toward full MoonPages 11–12
After more nights, Vince carries his notebook to another side of the garden and sees a bright round Moon above the orchard. Near full Moon, almost all of the side facing us is sunlit. A full Moon rises around sunset.
Ask together: What kind of drawing could Vince add now?
Daylight visibilityPages 13–14
In pyjamas at a closed window, Vince spots a pale Moon in the blue morning sky. The Moon reflects sunlight in daytime too. After full Moon it can remain in the morning sky; visibility depends on the phase, date, place and weather.
Ask together: What is different about the sky around this Moon?
Waning and comparing recordsPages 15–16
On a later morning, Vince draws a half-bright Moon beside an earlier full-Moon record. After full Moon the visible bright portion gets smaller over successive days. His notebook can keep both observations for comparison.
Ask together: What has changed between the two notebook drawings?
Sources and evidence
A crescent Moon can have a dimly visible round remainder, lit by earthshine. The bright crescent is not the whole physical Moon.
NASA Earth Observatory: Earthshine
Earthshine is sometimes visible; sky clarity and contrast matter. The closer sky view is not a scale map.
Clouds can obstruct a Moon observation without changing its phase; a passing gap may reveal the same phase minutes later.
Some clouds are thin enough for the Moon to remain visible. A thick cloud can hide it, and a clear gap may reveal it again.
The Moon can change position relative to fixed horizon landmarks over one evening, here becoming lower as it approaches setting.
NASA: Why Can You See the Moon During the Day?
Position comparisons work from the same safe viewpoint using fixed landmarks. Movement during one evening and changes in phase across many days occur on different timescales.
Across multiple nights the visible bright portion can grow from crescent through first quarter to full, then become smaller on later mornings. The Moon itself does not grow or shrink.
These selected observations span several weeks. The pictures use northern-hemisphere orientations; apparent tilt varies with the observer’s place and time.
A waning Moon may be visible in a blue morning sky; the Moon is not exclusively a night object.
NASA: Why Can You See the Moon During the Day?
Visibility depends on the Moon’s phase and position, the date, the observer’s location and the weather. Use only your eyes, and never look at the Sun.
Ordinary lunar phases arise from our changing view of the sunlit half as the Moon travels around Earth. Clouds and Earth’s shadow do not cause these phases.
Ordinary lunar phases have a different cause from the darkening during a lunar eclipse.
Repeated dated drawings of the Moon and nearby fixed landmarks can record changes, while missed observations remain gaps in the record.
Weather, obstacles and the Moon’s position can prevent a sighting. Recording a missed observation is useful too.
