In development

Makarov Earth Suite

Weather, water and landscapes: explore rainbows, sea breezes, rivers and geological processes.

80 modules · Page 4 / 4

This Suite is still in development. These are implemented experiments, not a released product.

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Physics / Math / Earth

Predator–prey (Lotka–Volterra)

An agent ecosystem: grass, herds, hunters - and Lotka–Volterra cycles.

Astronomy / Earth

Inside planets and the Sun

Probe a calculated rocky planet, or explore reference cutaways of the Sun and the four giant planets.

Seasons and obliquity — Actual application image

Astronomy / Earth

Why summer is warm: not because the Earth is closer to the Sun (it is closer in January) but because the axis leans, and a leaning hemisphere gets a higher Sun for longer. The Earth on its orbit with its axis fixed in space, lit from where the Sun is; an observer at any latitude with the day's Sun arc over the horizon; day length, noon altitude and daily insolation from the geometry, and the two hemispheres through the year.

Physics / Astronomy / Earth

Coriolis on a rotating Earth

A free particle over a rotating planet: the Coriolis force alone curls a straight shot into a circle.

Astronomy / Earth

Planetary energy balance

A 3D planet, sunlight and infrared paths, and a measurable energy budget. Change the atmosphere and follow surface warming or cooling.

Physics / Astronomy / Earth

Aurora (magnetosphere)

A charged particle on a real dipole field line: it either mirrors before reaching the atmosphere, or precipitates - decided entirely by its pitch angle.

Astronomy / Earth

Earth's orbital climate rhythms

Compare eccentricity, tilt and precession with summer sunlight at a selected latitude. Move through 400,000 years.

Astronomy / Earth

Impact and the ejecta curtain

Choose the target body and the impactor. The atmosphere brakes, breaks or bursts it; the crater takes its scaled size and shape; the ejecta fly with the speeds of their launch positions, the fastest escaping small bodies.

Astronomy / Earth

Tidal forces

Explore tidal stretching in 3D: compare a satellite tracer cloud with an isolated control, inspect differential gravity, and distinguish a close passage from ideal Roche estimates.

Astronomy / Earth

Moon phases and the terminator

Move through a lunar month. Compare the illuminated fraction seen from Earth with the Sun–Earth–Moon geometry.

Astronomy / Earth

A year written by the Sun

Trace the Sun at the same mean solar time throughout a year. Remove tilt or eccentricity to discover the two sources of the figure eight.

Astronomy / Earth

Eclipse geometry and Saros

Why a new moon is usually not an eclipse, what decides total against annular, and why the pattern repeats every eighteen years and eleven days. The Moon's orbit tilted 5° with its line of nodes, the umbra and penumbra as cones that reach the Earth or fall short, an observer at any latitude who sees the discs at their true sizes, and a table of the run's eclipses with the one a Saros later beside each. An idealised orbital model - circular orbits, mean motions - so it explains eclipses and dates none.

Physics / Earth

Rainbow

Trace refraction, dispersion and internal reflections through a spherical water drop. Compare primary and secondary rainbow angles and the reversal of colour order.

Math / Earth

Why maps lie

Small circles drawn on the globe, and the same circles on the map: Tissot's indicatrix, which is the whole measurement. Mercator keeps every circle round and swells them past thirty times; Lambert keeps the areas and squashes the shapes; nothing keeps both, and that is Gauss. Greenland is fourteen times smaller than Africa and Mercator draws it 10.47 times too big.