As gravitational fields interact, merging hydrogen clouds are compressed into dense spheres, each churning with thermonuclear energy: bright-blue baby stars. This cosmic crash, spotted by the Hubble telescope, is making them by the millions.
Some astronomers think the spectacular show is also our destiny. The Milky Way is on a collision course with nearby Andromeda; impact is due in about 5 billion years. Don't worry, though — by that time Earth will be about as inhabitable as a used briquette.
So enjoy these pictures while you can.