Hubble’s Exquisite View of a Stellar Nursery
This image from Hubble has plucked out an underlying population of infant stars embedded in the nebula NGC 346 that are still forming from gravitationally collapsing gas clouds.
They have not yet ignited their hydrogen fuel to sustain nuclear fusion. The smallest of these infant stars is only half the mass of our Sun.
Credit: NASA, ESA and A. Nota (STScI/ESA) larger image