Sure astronomers believe other planets exist. But finally, someone has managed to photograph one. A bunch of international astronomers, working at the Very Large Telescope (it's a real name) at the European Southern Observatory in the Atacama Desert in Chile, thinks they've photographed the very first planet outside our solar system:

The red spot is the planet, a giant that is four times bigger than Jupiter. As they say an image is worth a thousand words, an optical photograph is worth a thousand spectroscopic radiation analyses. The sun, dubbed 2MASSWJ1207334-393254 or "2M1207" to his friends, is a small brown-dwarf, a sun that failed to light up properly. According to spectroscopic analysis, water is found on the planet, a sure sign that it is cool and planet-like.