The last IUE observations (near phase 0.9) showed shell lines with greater redshifts and deeper absorption than around the rest of the cycle. The ultraviolet spectrum of VV Cep is compared to spectra ...

The colors of the rainbow are all around us, but so are hues that most of us can't see, including ultraviolet — a wavelength ...

What does a flower look like to a hummingbird? New research says it’s probably nothing like what humans perceive because ...

The study shows that UV colors are widespread in snakes, and may play a significant role in evading predators such as birds.