The smallest of these infant stars is only half the mass of our Sun!

The  exquisite sharpness of this 2005 image has plucked out an underlying  population of infant stars that are still forming from gravitational  collapsing gas clouds. They have still not ignited their hydrogen fuel  to sustain nuclear fusion. More about this NASA's Hubble Space Telescope image: http://go.nasa.gov/2pzoELk