ScienceThe ProfessorIntermediate
Ocean Worlds: Life on Saturn's Moons, a free science course on Tomo

Ocean Worlds: Life on Saturn's Moons

Explore the icy frontiers of Enceladus and Titan to uncover the chemical secrets of subsurface oceans and the potential for extraterrestrial life.

Like Duolingo, but for Ocean Worlds: Life on Saturn's Moons. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

87 levels across 8 sections, about 174 minutes end to end, roughly 35 days at five minutes a day. It moves through The Search for Wet Worlds, Enceladus: The Active Ocean, Titan: The Prebiotic Laboratory, The Mechanics of Subsurface Oceans, Energy and Metabolism, Tools of the Trade, The Limits of Life, and Reaching the Outer Moons. It assumes you already know the basics.

87 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Orbit the Otter, the guide who teaches the Ocean Worlds: Life on Saturn's Moons course
Ocean Worlds: Life on Saturn's Moons
with Orbit the Otter
87
Levels
8
Sections
5
Min/day
What you'll learn

Key ideas in Ocean Worlds: Life on Saturn's Moons

  • Habitability can exist wherever energy and liquid water meet
  • Icy crusts act as insulation for liquid oceans beneath
  • Surface temperature is irrelevant to subsurface liquid stability
  • Tidal forces from gas giants create friction and heat
  • Radioactive decay provides a steady internal heat source
  • Chemical gradients at vents provide energy without light
  • The shift from surface-centric to subsurface-centric habitability models
  • Identifying internal heating mechanisms that replace solar energy
  • The Frost Line marks where water transitions to solid ice
  • Volatile compounds like methane only freeze in the outer cold
  • Inner planets are stripped of light gases by solar heat
  • The distribution of chemical materials based on the 'Frost Line'
  • Gas giants create massive magnetospheres that shield moons
  • Magnetospheres deflect high-energy charged particles
  • Radiation protection is vital for preserving organic molecules
  • The role of planetary magnetospheres in protecting moons
Why not just Google it

You've tried the other tabs

Wikipedia

Thirty open tabs. Four facts you actually kept.

YouTube

You watched. You nodded. By Sunday it was gone.

ChatGPT

One answer, then back to scrolling.

Online courses

Eight weeks. You meant to finish. You didn't.

Tomo gives Ocean Worlds: Life on Saturn's Moons the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.

Try a question

Here's what playing it feels like

A real question from this course. Take your best guess.

Oceans Beneath the Ice

If a moon's surface is a frozen wasteland at -200°C, what does that tell us about the water deep underground?

Get it right to open this lesson and 86 more in the app.

Course map

Where Ocean Worlds: Life on Saturn's Moons takes you

  1. 1

    The Search for Wet Worlds

    • Beyond the Goldilocks Zone
    • The Case for Icy Moons
  2. 2

    Enceladus: The Active Ocean

    • Plumes and Hydrothermal Vents
    • Sampling the Spray
    • Gravity and Tidal Heating
  3. 3

    Titan: The Prebiotic Laboratory

    • Methane Cycles and Hydrocarbon Lakes
    • The Tholin Haze
    • Exotic Chemistry: Life without Water?
  4. 4

    The Mechanics of Subsurface Oceans

    • The Shell-Ocean-Core Sandwich
    • Salinity and Conductivity
    • Convection Currents in Ice
  5. 5

    Energy and Metabolism

    • Redox Gradients as Biological Fuel
    • Radiolysis: Energy from Radiation
    • Serpentinization and Hydrogen
  6. 6

    Tools of the Trade

    • Mass Spectrometry in Deep Space
    • Radar Mapping through Clouds
    • Gravity Science and Moment of Inertia
  7. 7

    The Limits of Life

    • Extremophiles as Earthly Proxies
    • Biosignatures vs. Abiotic Mimics
  8. 8

    Reaching the Outer Moons

    • The Dragonfly Mission Architecture
    • Planetary Protection Protocols
    • The Future of Sub-Ice Exploration

8 sections · 22 units · 87 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Professor

Ocean Worlds: Life on Saturn's Moons is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.

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