Astronomy and the Path to Astrophysics
Like Duolingo, but for Astronomy and the Path to Astrophysics. 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.
A deep dive: 32 levels across 5 sections, about 64 minutes end to end, roughly 13 days at five minutes a day. It moves through First Light: Navigating the Sky, The Solar System and Planetary Science, The Astronomer’s Toolkit, Stellar Evolution and the Galactic Scale, and Cosmology and the Professional Field. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in Astronomy and the Path to Astrophysics
- The purpose of the celestial sphere as a mental model
- Mapping sky coordinates to their Earthly counterparts
- Lower or negative numbers indicate brighter stars
- Constellations are defined boundaries/regions, not just stick figures
- Higher positive numbers indicate dimmer objects
- Knowing the constellation narrows down the search area in the sky
- Applying the counter-intuitive magnitude scale
- The Sun follows the Ecliptic throughout the year
- The planets and Moon stay near the Ecliptic because the solar system is flat
- The practical use of constellations in modern astronomy
- The Zodiac constellations are the ones located along this path
- Identifying what travels along the Ecliptic
- Stars appear to move in circles because Earth rotates on its axis
- The North Star sits almost directly above Earth's North Pole, making it the stationary center of the sky's rotation
- How Earth's rotation dictates the direction and center of star movement
- As Earth orbits the Sun, the 'night' side of the planet faces different directions in space
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 Astronomy and the Path to Astrophysics 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.
Where does the celestial grid get its orientation from?
Get it right to open this lesson and 31 more in the app.
Where Astronomy and the Path to Astrophysics takes you
Go beyond stargazing to understand the physics of the cosmos and the professional tools used to decode the universe. This course bridges the gap between an amateur hobbyist and a serious student of the stars.
- 1
First Light: Navigating the Sky
- Orientation in the Celestial Sphere
- The Mechanics of Observation
- 2
The Solar System and Planetary Science
- Dynamics of Our Local Neighborhood
- Exoplanets and the Search for Life
- 3
The Astronomer’s Toolkit
- Light as a Data Stream
- Telescopes and Digital Detectors
- 4
Stellar Evolution and the Galactic Scale
- The Life and Death of Stars
- Galaxies and Large-Scale Structure
- 5
Cosmology and the Professional Field
- The Origin and Fate of the Universe
- The Professional Astronomer’s Workflow
5 sections · 10 units · 32 levels. Built to play, not to enroll.
You pick the voice
Astronomy and the Path to Astrophysics 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 Astronomy and the Path to Astrophysics today.
Download Tomo, search Astronomy and the Path to Astrophysics, and play your first lesson in under a minute.