Labels:text | screenshot | font | number OCR: FACT FILE .............................................. PROTOSTARS give out some heat and light before they begin shining brightly as fully fledged stars. Much of this radiation is absorbed by the dust in the nebula that surrounds a protostar. The dust gives the radiation back out, mainly in the infrared region of the spectrum. Although astronomers may not be able to see protostars shining directly, they can detect their presence in a nebula using infrared telescopes.
