The Moon: A Scientific Guide to Earth's Natural Satellite
A connected introduction to lunar origin, interior, surface, orbit, environment and exploration.
Knowledge base
In-depth lunar guides
These guides explain the science behind the tools and missions. They start with plain-language concepts, then move into mechanisms, evidence, engineering consequences and important limitations.
Fundamentals
How the Moon Formed: Evidence, Models and Open Questions
How samples, isotopes, dynamics and computer models shaped the giant-impact framework and why details remain debated.
Lunar Gravity: Weight, Motion and the Reality of One-Sixth g
What lunar gravity changes, what it does not change, and why human movement cannot be scaled with one simple ratio.
Tidal Locking: Why the Moon Keeps Nearly the Same Face Toward Earth
How tidal evolution synchronized the Moon's rotation with its orbit, why the far side is not permanently dark, and how libration lets us see beyond one hemisphere.
Inside the Moon: Crust, Mantle, Core and the Evidence Beneath the Surface
How Apollo seismology, laser ranging, samples and gravity mapping constrain the Moon's internal structure and thermal evolution.
Environment
The Lunar Day and Night: Sunlight, Shadows and a 29.5-Day Cycle
Why lunar daylight lasts for days, how local sunrise works and why polar illumination behaves differently.
Temperature on the Moon: From Sunlit Ground to Polar Cold Traps
Why there is no single lunar temperature and how sunlight, latitude, material and terrain control the thermal environment.
The Lunar Exosphere: The Moon's Extremely Thin Atmosphere
What surrounds the Moon, where its particles come from and why calling the Moon completely airless is an oversimplification.
Lunar Magnetism: Ancient Dynamo Evidence and Local Magnetic Anomalies
Why the Moon lacks a global magnetic field today, what magnetised rocks imply about the ancient interior, and how local crustal anomalies interact with the solar wind.
Surface
Lunar Geology: How to Read the Moon's Surface History
A field guide to highlands, maria, basins, craters, volcanic landforms and relative age.
Lunar Regolith: Dust, Broken Rock and an Archive of Space Weathering
How impacts create regolith, why lunar dust behaves differently from soil and what the layer records.
How Lunar Impact Craters Form and What They Reveal
From excavation and shock to central peaks, ejecta rays and the geological clock recorded by crater populations.
Lunar Maria: The Moon's Ancient Basalt Plains
Why the dark patches face Earth, how lava filled impact basins and what basalt reveals about the lunar interior.
The Lunar South Pole: Light, Shadow, Ice and Exploration
Why south-polar terrain has become a focus of science and exploration without reducing the region to a simple 'ice mine'.
Water and Ice on the Moon: What Has Actually Been Detected
A careful guide to hydroxyl, molecular water, hydrogen signatures, cold-trapped ice and the limits of current evidence.
Near Side vs Far Side: Why the Two Hemispheres of the Moon Look Different
Why broad dark maria dominate the familiar near side while the far side contains thicker highland crust and the immense South Pole-Aitken Basin.
Space Weathering on the Moon: How Exposure Changes Surface Grains
How solar wind, micrometeoroids and vacuum exposure alter lunar regolith and change the spectra and appearance used in remote sensing.
Engineering
How Spacecraft Travel from Earth to the Moon
Launch, parking orbit, translunar injection, coast, navigation and arrival explained as a connected mission sequence.
Understanding Lunar Delta-V: The Currency of Spacecraft Manoeuvres
How mission planners use delta-v, why budgets depend on architecture and why the rocket equation creates difficult trade-offs.
How Lunar Landers Descend and Land
From deorbit and powered descent to hazard avoidance, throttling and touchdown in an airless world.
How Lunar Rovers Move, Navigate and Survive
Traction, wheel design, navigation, power, dust and communications on a rough low-gravity surface.
Communicating Between Earth and the Moon
Light-time, antennas, line of sight, relay spacecraft, bandwidth and why the far side needs special infrastructure.
Powering Lunar Missions: Solar Arrays, Batteries and Nuclear Options
How location and mission duration shape the energy system of a lunar spacecraft or surface base.
Surviving the Lunar Night: Energy, Heat and Operations
Why a long period without sunlight can determine an entire surface mission architecture.
Radiation on the Moon: Sources, Exposure and Shielding
Galactic cosmic rays, solar particle events and why the absence of a thick atmosphere changes surface protection.
Navigation on and Around the Moon
How spacecraft determine position without relying on ordinary terrestrial GPS coverage.
Why the Moon Needs Coordinated Time
Relativity, navigation and the emerging work toward a common lunar time reference without pretending an official consumer clock already exists.
Lunar Dust as an Engineering Hazard: Adhesion, Abrasion and Contamination
Why fine lunar dust threatens seals, optics, radiators, suits and mechanisms, and why mitigation has to be designed into surface systems.
Thermal Control on the Moon: Keeping Spacecraft and Habitats Within Limits
How radiation, conduction, insulation, heaters, radiators and location-specific sunlight determine spacecraft thermal design on the Moon.
Lunar Landing Guidance, Navigation and Control
How a lander estimates position and velocity, steers a powered descent, detects hazards and reaches a safe touchdown without atmospheric braking.
Lunar Relay Communications: Connecting the Far Side and Polar Regions
Why the Moon blocks direct radio links, how relay orbits restore line of sight, and how shared lunar communications networks could support many missions.
Observation
How to Observe the Moon: A Practical Guide
Binoculars, telescopes, phases, seeing, filters, maps and a repeatable observing routine.
Moon Phases: Geometry, Illumination and Common Misconceptions
Why phases happen, why everyone sees the same phase and how phase differs from moonrise time.
Observing the Lunar Terminator: Where Shadows Reveal Terrain
How changing Sun angle turns flat-looking lunar markings into a landscape of relief.
Choosing and Using a Telescope for Lunar Observation
Aperture, focal length, eyepieces, field of view and realistic magnification for observing the Moon.
Lunar Photography: Framing, Resolution and Capturing Fine Detail
How focal length, sensor size, sampling, seeing and stacking shape photographs of the Moon.