Another way heat moves is radiation . In radiation, the heat passes directly through space in the form of photons, tiny packets of energy travelling at the speed of light. Radiation is the way that the sun's warmth reaches Earth. Finally there's convection . In convection, heat warms the air.
Convection is the reason stars twinkle.
When air heated by convection rises, it tumbles and swirls. That's why the air shimmies over a fire or a radiator. As air warmed by the earth rises through the atmosphere, it breaks into bubbles of warm air. As light from the stars passes through the bubbles, it's bent back and forth. This is what makes the stars seem to twinkle.