This stunning image features a deep field view of the Cassiopeia constellation where the two small planetary nebulas can be found, Abell 6 and the larger HFG1.

You know, after decades of pointing optics toward the sky, I consider myself a knowledgeable observer. But while researching the Pleiades a few months back, I was surprised to learn that it wasn't the ...

Light, especially blue-enriched light (which has a higher amount of blue colours in it, like the light at midday), plays an important role in how well we sleep ...

This is likely because we evolved to see the natural bright blue sky during the day, rather than indoor electric lights at night which are much less bright – or blue. As we age, our eyes change ...

NASA explained this is the same process that causes the skies to turn blue ... sky Thursday night and into Friday morning. The moon shifted from its regular bright white appearance to a deep ...