Pulsars
http://www.jb.man.ac.uk/~pulsar/Education/Sounds/sounds.html
A pulsar is a highly magnetised neutron star, with a radius of 10-15 km, having somewhat greater mass than the Sun which has a radius of approximately 1 million km. Radiation is beamed out along the magnetic poles and pulses of radiation are received as the beam crosses the Earth, in the same manner as the beam from a lighthouse causes flashes.
Listen to the sound of a Pulsar
Planets
http://www.nasa.gov/mission_pages/cassini/multimedia/pia07966.html
Saturn is a source of intense radio emissions, which have been monitored by the Cassini spacecraft. The radio waves are closely related to the auroras near the poles of the planet. These auroras are similar to Earth’s northern and southern lights. This is an audio file of radio emissions from Saturn.
Listen to the eerie Sounds of Saturn’s Radio Emissions
Poms
http://www.envelooponline.com/main.htm
POM is the short for Petit Objet Musical, that is, a Little Musical Object (…)They are offered as landscapes or “living sculptures”(…)I record typically two to three minutes as to get a detailed image of all the nuances in the sound, but these are only windows into conceptually infinite pieces.
Listen to Pom n.17 (which I also call “Forbidden Planet”, after the soundtrack of the classic movie).
Source: musicthing