# How a gearbox works. And Beautiful shooting star ..

The red, green, and blue parts are all connected together all the time and are always spinning.
What you're doing is moving the purple collars (which are all always connected to the teal shaft) to engage them with one of the many blue gears and make the teal shaft spin.
Unless we're talking about reverse, in which case another gear is added in which makes the teal shaft spin the opposite way. and the scary numbers are the number of teeth on each gear.. The ratio is the one thats driven over the one that drives(main power input).. the higher the ratio, like in lower hears, the more torque, the lower the ratio, like in higher gears, gives less torque but allows for higher speed. This just shows how they manage to get all ratios out of it.
The engine is turning the green crank shaft at the top, that is turning the red shaft on the right which is then turning the blue gears in the transmission. Because of their different sizes, the gears turn at different speeds or rpm(rotations per minute). Those are positioned on the real drive shaft, which turns the axle and wheels, but they are not connected to the drive shaft so they spin seperately from it.

This is a holy-shit level photograph. The lighting is incredible - probably one of those 2 minute exposures. Maybe a bit less since the stars don't leave tracks. This isn't just an accidental camera phone pic - whoever took this knew what they were doing and set it up on a tripod. Then suddenly a shooting star appears. Friggin incredible luck.
Or photoshop. I choose to believe it's real.