When the Undertones sang about "Teenage Kicks," they could well have been inadvertently referring to the chaotic and violent "teenage" periods of planetary systems that are shaped by collisions between bodies of various sizes, such as the impact upon Earth by a massive body that created the moon.
Now, using the world's largest radio telescope project, the Atacama Large Millimeter/submillimeter Array (ALMA), astronomers have captured snapshots representing the chaotic "teenage years" of planets forming around infant stars.
