Rho Ophiuchi is that
colourful little
patch of
stellar candy near
Antares. It's
multicolouredness is caused by the
many different
processes happening here. Present are
both reflection nebulae, and
emission nebulae. There are also many
dust clouds present, that are
lighted up by
nearby stars, (like Antares).
These
gas and dust clouds are even more
colourful than our "
visible"-
spectrum-
seeing-
only eyes can
detect,
emitting light across the
electromagnetic spectrum.
For some nice Rho Ophiuchi APODs, link:
http://antwrp.gsfc.nasa.gov/apod/ap000305.html
http://antwrp.gsfc.nasa.gov/apod/ap970922.html
http://antwrp.gsfc.nasa.gov/apod/ap960312.html