Surveying the current practical and theoretical factors for and against space elevators (including partial elevators—skyhooks!).
A lovely visualisation of asteroids in our solar system.
This orrery is really quite wonderful! Not only is it a great demonstration of what CSS can do, it’s a really accurate visualisation of the solar system.
Luke just demoed this at Codebar. It’s a lovely audio/visualisation of the solar system—a sonic orrery that you can tweak and adjust.