A mysterious spiraling blue light illuminated the night ... shows the glowing light spinning across the sky in what many social media commentators likened to a spiral galaxy.

Each type of cone, plus the rods, are sensitive to light of different wavelengths, but all of them get stimulated to some degree by the sky. Our eyes respond more strongly to blue, cyan ...

But did you know the color of the sky will also change? In the spring and summer, you’re more likely going to see a light blue sky. Sometimes, it’s kind of a milky appearance, and some days ...

Adding a new choice to the lineup of MacBook Air colors is the all-new sky blue. A beautiful, metallic light blue that creates a dynamic gradient when light reflects off of its surface ...

A weird blue spiral of light, captured on photo in the night sky? As much as we might want it to be, we know by now that it's not aliens (it's never aliens, OK?). But little green men aside ...

The appearance of an extraordinary spiral of blue light in the sky above New Zealand has prompted amazement among stargazers - and theories ranging from aliens to black holes. Astronomer Alasdair ...