Put these three things together, and a blue sky is inevitable. Here's how it all comes together. Light of many different wavelengths, not all of which are visible, are emitted by the Sun.

If it really was blue light that was scattered most, then we'd see the sky as a slightly greenish blue. We don't see the greenish hue, however, because of the sky's violet light.

The writer recalls very vividly the blue aspect of the sky as seen from the top of the San Francisco Mountains in Arizona, which have an altitude of 13,000 feet above the sea; and in an ascent of ...

Biology is part of the reason we see the sky as blue. Those color-sensitive cones in our eyes react most strongly to blue, green, and red wavelengths; this is why we see colors the way we do. Blue and ...

Pluto's atmosphere has a blue haze, in a new photo from the New Horizons probe. But the particles causing that color are probably gray or red — and the planet's surface has red ice.

Apple recently announced a new generation of the MacBook Air, which is powered by the M4 chip. Although it has the same design as the previous generation, it now comes in a new sky blue color.

If you’ve ever seen video of a rocket going into space, you can see the blue sky fade away to a black background as it climbs above the atmosphere. Watch a space shuttle launch.