Because it wants to be.
The lighter sky under a rainbow is created by the way that light is bent inside raindrops. The raindrops also focus the sunlight into an expanse of bright light that illuminates the sky under the rainbow's arc.
It won't. A ballong will only rise if the gas in it is lighter than the air around it.
The color sky blue is a lighter shade of blue. The color is called sky blue because it is to resemble to same color as the sky. When the sun is out the sky is a beautiful shade of blue.
Birds have Hollow bones, that makes it lighter so they can soar in the sky.
There
A layer of the sky that is lighter than the rest due to the way the moon is that night.
== == Ancient man looked up into the night sky and saw it, a swathe of lighter colored sky that looked like milk spilled on a dark table.
Yes. A moon revolves around a planet, which is also around a sky. Stars are balls of gas in the sky.
Helium is lighter than air, therefore it rises upwards.
The sky can be orange around sunrise and sunset.
The balloons that float usually contain helium in them, which is lighter than air. This enables the balloon to float.
usually to get sky blue ... you mix blue and white. like how you mix red and white for pink, you mix a color with white to get the lighter version of the color. hope i helped!