young stellar object
A protostar in which the dust and gas have collapsed into a sufficiently massive body for fusion to begin. The characteristic trait of young stellar objects is the presence of jet outflows-either of molecular gas or of radioactive emissions-that interact with the interstellar medium out of which the star has just been born. See more at protostar.
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What Are Prepositional Phrases?Prepositional phrases are the kinds of things you use all the time without thinking about them. They’re groups of words that begin with a preposition and end with an object. Prepositions are words like about, across, after, for, and in. You’ll see them in simple prepositional phrases, like about zebras, after school, and with friends. Objects of Prepositions When we say object, we mean the …
Nearby words
young man, young offender institution, young one, young plan, young pretender, young stellar object, young thing, young turk, young turks, young's modulus, young's rule
The American Heritage® Science Dictionary
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