ScienceThe ProfessorIntermediate
The Life Cycle of the Cosmos course icon

The Life Cycle of the Cosmos

Like Duolingo, but for The Life Cycle of the Cosmos. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.

For the part of you with thirty open tabs that never became anything.

12 bite-size levelsAbout 5 minutes each

Free forever · No credit card · iPhone & Android

Nova the Nebula
The Life Cycle of the Cosmos
with Nova the Nebula
12
Levels
2
Sections
5
Min/day
What you'll learn

Key ideas in The Life Cycle of the Cosmos

  • Self-gravity must be strong enough to overcome the structural rigidity of rock and ice
  • The Frost Line is the distance where solar heat no longer vaporizes water ice
  • Hydrostatic equilibrium allows a body to flow into a rounded shape based on its rotation
  • Abundant solid ice beyond the line allowed planets to grow large enough to pull in gas
  • Smaller asteroids lack the mass to generate the internal pressure needed for rounding
  • Inner planets remained small because only rare heavy elements could stay solid
  • The physical difference between a small asteroid and a world in hydrostatic equilibrium
  • How the Frost Line determined planetary composition
  • Orbital resonance occurs when two bodies exert regular, periodic gravitational tugs
  • A major planet must be the primary gravitational force in its orbital zone
  • Repeated alignment with a giant planet destabilizes and ejects smaller objects
  • Dwarf planets like Pluto share their orbital space with many other Kuiper Belt objects
  • Resonance can also 'trap' objects into stable groups, like the Trojan asteroids
  • Extreme cold preserves the original chemical composition of the solar nebula
  • The effect of orbital resonance on small body populations
  • These regions contain 'planetesimals' that never merged into larger planets
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 The Life Cycle of the Cosmos 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.

Gravity, Ice, and the Frost Line

What happens to water compounds once they are located beyond the solar system's Frost Line?

Get it right to open this lesson and 11 more in the app.

Course map

Where The Life Cycle of the Cosmos takes you

Move beyond basic planet-spotting to understand the grand mechanisms of the universe, from the birth of stars in gas clouds to the dark matter holding galaxies together.

  1. 1

    The Architecture of Our Neighborhood

    • The New Solar System Map
    • The Stellar Engine
  2. 2

    Deep Space and Galactic Scale

    • Galactic Structures and Dark Matter
    • Nebulas and the Chemical Legacy

2 sections · 4 units · 12 levels. Built to play, not to enroll.

How it's taught

You pick the voice

This course
The Professor

The Life Cycle of the Cosmos 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.

Start free

Start The Life Cycle of the Cosmos today.

Download Tomo, search The Life Cycle of the Cosmos, and play your first lesson in under a minute.