People usually think of an astronomer as a scientist who looks at the stars through the eyepiece of a telescope. In reality, though, astronomers do their research by analyzing data collected by instruments connected to telescopes and stored digitally. These numbers are usually shown or turned into images. Currently, researchers are investigating novel methods of representing data by converting it to sound. The Audible Universe aims to convey scientific data, particularly astronomical data, using sound. The Audible Universe is the result of a team of worldwide scientists working together to combine two communities: astronomers and professionals in the many domains of sound. Two years after the project started, the first results are shown in a special issue of Nature Astronomy. This issue has four articles about the use of sound in astronomy. The first article gives an overview of the project's goals. The second article, led by Anita Zanella, a researcher at the National Institute of Astrophysics and representing the Italian astronomical community, gives a list of the instruments that have been made to give sound to astronomical data, the challenges and the possible solutions. The fourth article, "Sound People Speak to Star People: A Sound Expert's View on Astronomy Sonification Projects," sees amoung the authors Massimo Grassi, a professor of general psychology at the University of Padua. This last article explains how to use knowledge from the fields of psychology of perception and psychoacoustics to make astronomical data sound. " The aim is ambitious: to render audible what has been conveyed visually for generations", Grassi - the initiative's representative for national auditory research - says. "But this goal goes hand in hand with the applications that these sonifications – as they are known in the jargon – may find: from the ability to analyze extremely big data streams to providing access to this sort of information for those with visual impairments".