| Answer | Crossword Clue |
|---|---|
| protostar | a condensing mass of gas in the early formation of a star |
| protostars | PROTOSTAR, a condensing mass of gas in the early formation of a star |
| protostar | A contracting mass of gas that represents an early stage in the formation of a star, before nucleosynthesis has begun |
| protostars | A contracting mass of gas that represents an early stage in the formation of a star, before nucleosynthesis has begun |
