Comet Lovejoy on May 22, 2015. The comet is the brilliant green dot near the center of the photo. At the upper right of the photo is the star Polaris, aka the North Star.
Tenerife in the Canary Islands is one of the best places in the world to look up. Here's the shadow of Roque del Conde, a landmark mountain there, cast on clouds.
Even in bright moonlight, astrophotographer Justin Ng captures amazing shots of the Milky Way. Here's one from May 6, during the peak of a meteor shower.
Here's a sea fog, called a haar in Scotland. They occur on the east coast of England or Scotland in spring and summer, when warm air passes over the North Sea.