Define the observation
The investigation focuses on how the visible illuminated fraction of the Moon changes during its cycle.
ASTRONOMY · DIGITAL SCIENCE PROJECT
Moon
Observation
IL ALEMERA · SPACE SCIENCE
A practical investigation of the Moon's changing appearance through observation, simulation, structured data, visualization, and scientific analysis.
EXPLORE PROJECT ↓
01
PROJECT OVERVIEW
Moon Observation
This project investigates the apparent changes in the Moon's illuminated portion during one lunar cycle. An interactive simulation is used to demonstrate the geometric relationship between the Sun, Earth, and Moon. The project combines astronomical concepts, computational simulation, structured data, visualization, and scientific interpretation.
29.53
LUNAR SYNODIC PERIOD · DAYS
8
MAIN LUNAR PHASES
0–100%
ILLUMINATION RANGE
360°
APPROXIMATE ORBIT ANGLE
INTERACTIVE LUNAR SIMULATION
DAY 0.0
SUN
EARTH
LIVE OBSERVATION DATA
PHASE
New Moon
AGE
0.0 d
LIGHT
0%
ANGLE
0°
0.85
02
OBSERVATION METHOD
How The Project Works
Simulate the geometry
The Moon is moved around Earth while the Sun provides the illumination. The changing geometry produces the different lunar phases.
Record the data
Lunar age, orbital position, phase, and estimated illuminated fraction are represented as structured data.
Analyze the pattern
Illumination values are visualized to identify the waxing and waning portions of the lunar cycle.
03
LIVE DATA ANALYSIS
Lunar Illumination
The chart represents the Moon's illuminated fraction throughout the simulated lunar cycle.
What the simulation demonstrates
Starting near New Moon, the visible
illuminated fraction increases during
the waxing phases.
It reaches approximately maximum
illumination around Full Moon.
After Full Moon, illumination decreases
through the waning phases until the
cycle returns to New Moon.
04
STRUCTURED DATA
Lunar Dataset
The table below contains representative simulation measurements across the lunar cycle. The values describe lunar age, orbital position, phase, and estimated illumination.
| DAY | LUNAR AGE | PHASE | ANGLE | ILLUMINATION |
|---|
05
SCIENTIFIC EXPLANATION
Why Does The Moon Change?
The Moon does not produce its own visible light. Sunlight illuminates the Moon, and from Earth we observe different portions of that illuminated surface as the Moon moves around Earth.
Sunlight illuminates the Moon
Approximately half of the Moon is illuminated by sunlight at any moment.
The Moon orbits Earth
As the Moon changes its position around Earth, the viewing geometry changes.
The visible fraction changes
From Earth we see different portions of the illuminated half.
Lunar phases appear
These changing visible fractions produce the familiar sequence of lunar phases.
Important distinction: Normal lunar phases are not caused by Earth's shadow. Earth's shadow crossing the Moon produces a lunar eclipse.
06
OBSERVATION RESULTS
Results
WAXING
ILLUMINATED FRACTION INCREASES
FULL
MAXIMUM VISIBLE ILLUMINATION
WANING
ILLUMINATED FRACTION DECREASES
REPEAT
CYCLE RETURNS TO NEW MOON
The simulation demonstrates a predictable repeating pattern in lunar illumination. The data visualization makes the increase and decrease in illuminated fraction easier to identify than observing isolated phases.
07
PROJECT CONCLUSION
Conclusion
The Moon's changing appearance can be explained by the changing geometry of the Sun, Earth, and Moon.
By combining simulation, structured data, visualization, and scientific explanation, this project demonstrates how an astronomical phenomenon can be investigated using a computational approach.
08
FUTURE DEVELOPMENT
Future Projects
This project can be expanded into more detailed astronomical simulations involving planetary motion, eclipses, observational astronomy, orbital mechanics, and larger astronomical datasets.
ECLIPSES
MODEL SOLAR AND LUNAR ECLIPSE GEOMETRY
ORBITS
EXPLORE PLANETARY ORBITAL MOTION
STARS
ANALYZE OBSERVATIONAL ASTRONOMY DATA
SPACE
DEVELOP MORE COMPUTATIONAL SPACE SCIENCE PROJECTS