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Loading contentTwo terrestrial neighbors of Earth — a cold desert world and a scorching greenhouse.
The Red Planet, a cold desert world.
Earth's size, but a scorching greenhouse world.
Connections both Mars and Venus share in the knowledge graph.
The global movement of a planet's atmosphere, driven by uneven heating and the planet's rotation — the banded jets and great storms of the gas giants, the super-rotating winds of Venus that lap the planet in days, and the planet-wide dust storms of Mars.
The gradual loss of a planet's atmosphere to space — light gases escaping thermally, the solar wind stripping the air from an unmagnetised planet, or impacts blasting it away. It is why Mars, which lost its magnetic field, also lost most of its once-thick atmosphere.
How a planet's climate changes over billions of years — the runaway greenhouse that turned Venus into a furnace, the slow drying and cooling of Mars, and the feedbacks that have kept Earth habitable. Comparing the three is the key to understanding what makes a climate stable.
Compares two concepts by the real common ground between them — the entities they both connect to in the graph. Mars and Venus, for instance, share atmospheric escape, climate evolution, and their place in the Solar System. A comparison built from relations, not rhetoric.
The Sun and the bodies gravitationally bound to it.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.