The bright planet Mars and faint planet Neptune are in conjunction now, near each other on our sky's dome. Here's a fanciful image and a more realistic one.
You'll see a true iridescent cloud when the sun is nearby. The colors will appear randomly distributed. Here's one with beams of light - crepuscular rays, or sunrays - appearing to shoot from it.
Photographer Eliot Herman got lucky and captured a pink lunar halo when he was out snapping pictures of Venus before dawn on November 26 in Tucson, Arizona.