Yes there is such a thing , very rare , but it does occur. the condition occurs when a bright moon is low in the horizon at the viewer’s back shining onto a light rain in the distant . A moonbow is basically a rainbow at night where the source of light is the moon instead of the sun. This is a rare occurrence because the moon is only bright for a short period, full moon rises after dark, and of course there has to be rain in front of the viewer while his back is to the moon, but not enough cloud cover to shade the moon. Waimea , Hawaii is a very good location for moonbow viewing especially on road 250 toward Hawi due to the Kohala Mountain Ranch running north south, trade winds pile up clouds then sprinkle rain east to west. The moon rises over the mountain then with the right amount of rain and cloud cover, we have a moonbow. There are more moonbow images on my Flickr. Also note that Venus was the brightest i have ever seen.