When dense regions of a cloud collapse, the massive inner part becomes a star while the rest forms a swirling disk of gas and dust that may give rise to planets. (discovermagazine.com)
Over millions of years, one relatively dense region of the cloud begins to collapse in on itself. (discovermagazine.com)
Over the span of just weeks, two of the nation's most population - dense regions began a long and difficult road to recovery. (plu.mx)