conjectured that the blue color of the sky was the result of the mixing of the white sunlight reflected from the upper layers of the atmosphere with the intense blackness of space. Historically ...

In the back of our eyes is a layer called the retina ... and will sometimes appear against a white or light-blue background such as the sky. Because white blood cells are so small, they can ...

This is because the sunlight is passing through a thicker layer of our atmosphere ... you can see the blue sky fade away to a black background as it climbs above the atmosphere.

It's actually vivid, you can check for yourself. Perhaps the muted sky blue color reflects a Bay Area late winter/early spring frequent layer of clouds like we typically see here in Seattle.

Look up on a clear sunny day and you will see a blue sky. But is this the true color ... and molecules is a smattering of sodium. This high layer of sodium atoms is actually useful to astronomers.

Jake Clark is supported by an Australian Government Research Training Program (RTP) Scholarship. Is the sky blue on other planets, like on Earth? What is an atmosphere, and do other planets have one?