Fireflies need darkness to communicate. Males perform an airborne dance while flashing their abdominal lanterns in a pattern ...

The blue-silver streaks shine brightly ... “They’re really remarkable to see,” said Deland. “The clouds really just shine against the dark sky.” This week, sky watchers in the upper ...

There are the puffy cotton ball-like clouds against the blue sky — those iconic cumulus ... us feel cheery and energetic, while a sky covered with dark gray clouds can make things feel subdued ...

Known as noctilucent, these clouds were glowing a stunning blue in the sky just after the sun moved below the horizon. Reports of the eerie-looking clouds came from Oregon, Washington, Alberta ...

Storm clouds come in many shapes and sizes ... The sun is still shining but, the sky is extremely dark to the west. Pitch black, as many would call it. I remember growing up seeing this type ...

If you have a chance, check it out on the next dark, clear, moonless night. The post Deep-Sky Dreams: The Cepheus Molecular Cloud appeared first on Astronomy Magazine.

On Saturday, in Washington, November flung off the gray mask it wore on Friday and once more dazzled the city with the glories of late autumn, with blue ... many clouds shared the sky, they ...