It is a glow-in-the-dark night sky too, colored a mix of green, yellow, and red. Its colors result from scattered sunlight, oxygen, and sodium from shooting stars.

Let's go over the basics of how blue skies work: Light from the sun is made up of many colors, which manifest in different wavelengths. For example, red light has the longest wavelength and, on ...

Blue light has a shorter wavelength, due to which it’s scattered more easily by the tiny molecules in the air. This scattering, known as Rayleigh scattering, is why we see a blue sky during the day.

In August 1883, the eruption of the Krakatoa volcano in Indonesia triggered a series of atmospheric phenomena so dramatic ...

The violet and blue light that gets scattered can still make it to our eyes, and since human eyes are very receptive to blue light, the sky looks blue. This process is known as Rayleigh scattering.

This mellow light blue may certainly seem familiar. Depending on where and at what time of the day you look at the sky, you might well expect to catch a glimpse of a similar color.

Learn more about what a star’s color means and while you’ll never see a twinkling green star in the night sky.

The sky of Mars near the Sun appears blue, while the sky far away from the Sun appears red. The disk of the Sun appears mostly white, with a slight bluish tinge.

A dazzling fireball lit up the sky over southern Japan on August 19. The bright flash was visible from hundreds of kilometers ...