Another huge Hubble discovery was a missing link in what we knew about planet formation. Here's how NASA descibes it" "Take light and fluffy stardust, condense to rocks. It's the "condense to rocks" part scientists have been eager to see. Like making a pizza, a cloud of stardust has to go from a blob to a relatively flat disk to form a new star and planet system." Here's a piece of Orion where planets are forming.