How high does blue go?
Drag your guess, then climb.
Scroll or drag up
Airplane
Its wings need air flowing around them.
OrbitAbove almost all the air
High airEnough air for wings
Low airThick air near Earth
Mission complete
You reached orbit.
Blue faded gradually as the air thinned.
From wingbeats to orbit.
Going up means thinner air. Birds and planes need it; satellites curve around Earth above almost all of it.