The Mechanics of the Cosmos
Like Duolingo, but for The Mechanics 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.
45 levels across 8 sections, about 90 minutes end to end, roughly 18 days at five minutes a day. It moves through Observational Foundations, Terrestrial and Inner Worlds, The Outer Giants and Their Moons, Stellar Life Cycles, Exotic Stellar Remnants, Black Holes and Quasars, Galactic Structure and Evolution, and Cosmology and the Large Scale. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in The Mechanics of the Cosmos
- The ecliptic is the projection of Earth's orbit onto the celestial sphere
- Lower or more negative magnitude numbers indicate brighter objects
- Planets stay near the ecliptic because the solar system is relatively flat
- The scale is logarithmic, meaning small number changes equal large brightness jumps
- The sun appears to travel this same path throughout the year
- Vega is the historical zero-point for the magnitude scale
- Predicting where to find planets in the night sky
- Ranking celestial objects by their observed brightness
- Retrograde is a perspective shift as Earth passes a slower outer planet
- Seeing refers to the stability of the air, not the clarity of the sky
- Outer planets always move in one direction but appear to loop from our view
- Bad seeing causes 'boiling' images that prevent high-magnification detail
- This effect occurs most prominently when an outer planet is at opposition
- LPR filters target the specific yellow/orange glow of streetlights
- Understanding the cause of retrograde motion
- Nebulae emit light at specific wavelengths that filters allow to pass
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Mechanics 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.
Here's what playing it feels like
A real question from this course. Take your best guess.
If you are comparing two stars, which apparent magnitude value represents the brighter object?
Get it right to open this lesson and 44 more in the app.
Where The Mechanics of the Cosmos takes you
Go beyond the basics of stargazing to master the physics of planetary systems, the life cycles of stars, and the extreme environments of black holes and quasars.
- 1
Observational Foundations
- Navigating the Celestial Sphere
- The Tools of Modern Astronomy
- 2
Terrestrial and Inner Worlds
- Planetary Geology and Heat
- Atmospheric Evolution and Loss
- 3
The Outer Giants and Their Moons
- Gas and Ice Giant Dynamics
- Ocean Worlds and Orbital Resonance
- 4
Stellar Life Cycles
- The Main Sequence and Fusion
- Stellar Death and Nucleosynthesis
- 5
Exotic Stellar Remnants
- Neutron Stars and Pulsars
- 6
Black Holes and Quasars
- The Physics of the Event Horizon
- Active Galactic Nuclei and Quasars
- 7
Galactic Structure and Evolution
- Galactic Morphology and Dynamics
- The Dark Matter Mystery
- 8
Cosmology and the Large Scale
- The Expanding Universe
- Dark Energy and the Ultimate Fate
8 sections · 15 units · 45 levels. Built to play, not to enroll.
You pick the voice
The Mechanics 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.
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Start The Mechanics of the Cosmos today.
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