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Salt Worlds

Blinding evaporite flats on dry, salt-crusted rocks.

A salt world forms when sodium and chlorine share a dry, warm rocky surface: with no water cycle to dissolve them, the salts precipitate into planet-wide evaporite flats - halite plains, brine pans, and salt-crusted ridges that gleam almost white under their sun. Build one by pairing sodium and chlorine on a dry rocky recipe inside the warm band, and keep hydrogen low so no ocean ever washes the flats away.

See all salt worlds on Explore

A binary star system's orrery: two suns close together, a red dashed dead-zone boundary, and a debris trail left by a destroyed world

New: Binary Star Systems 🌀

A system can now orbit two suns. Add a companion star when you build one — close, medium, or wide — and the physics decides what survives: a shared center of mass carves out a dead zone where gravity from both stars tears a world apart, leaving it as debris, and every surviving planet's orbit goes elliptical, moving fastest at closest approach and slowest out at aphelion. Push the separation to wide and the dead zone opens tens of AU across, wide enough to gut a system that would have been stable around one star alone. Stand on a world that made it through and you'll watch two suns cross the sky together.

Create your free account

Enter your email and we'll send a 6-digit code — no password needed.
We only keep your email and the username you choose. We never share or sell your email, and we don't send marketing — we use it only to email you a sign-in code. Read our privacy policy.

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