Deep Space
You know the planets. This is everything beyond them: how stars die, what a black hole really is, why the universe is stretching, and what the other 95% is.
Each lesson starts with a number that should not be true, then explains it properly, with the actual equations and the people who found them. Every lesson has labs you can play with: build a star, squeeze the Earth into a black hole, fit a galaxy's dark matter, fire Newton's cannon.
Where scientists still disagree, the lessons say so. There are open problems in every one, and some of them could be solved by whoever reads this. Start with the map or pick any card. They can be taken in any order.
The map — click a branch to open its lesson
Six branches, six lessons. Each lesson has a hook, the idea, a lab, a challenge and a section of open questions.
The six lessons
How Stars Live and Die
Black Holes
The Expanding Universe
Other Worlds
The Dark Universe
Getting There
How each lesson works
A number that should not be true, and two questions to predict first.
The real explanation, with the people who found it and the equations behind it.
Interactive models you can change and break.
Five questions. Wrong answers explain themselves.
Explain it out loud, then follow the open questions.