Rainbows form when a unique combination of meteorological and atmospheric conditions come together at the perfect time, and ...

Its variety of colors is the result of the presence ... eventually erupting as a viscous surface lava flow. This molten earth origin is what classes rainbow obsidian as an igneous rock.

During the total lunar eclipse early Friday morning, the moon will still be visible in the night sky, but its color will change. Here's when and how to see the Blood Moon.

You can see the lunar eclipse beginning around 11 P.M., but to see the peak of the eclipse you’ll have to be watching the skies around 2 A.M.