File:The IRAM 30-meter Telescope Scanning The Night Sky.jpg
The telescope is a classic single dish parabolic antenna, which allows the exploration of extended cosmic objects such as nearby galaxies and interstellar clouds. Due to its large surface, the 30-meter telescope is unrivalled in its sensitivity and is well adapted to detect weak sources.
By pointing the telescope towards a celestial source, and then by scanning and tracking the source, one can build up radio images – whether of complete galaxies or regions of star formation in the Milky Way. With its ability to observe simultaneously at several wavelengths, the telescope can produce multiple images.