Some young star clusters contain large numbers of protostars.

Question

Quizplus · Accepted Answer

Young star clusters are known to contain large numbers of protostars, which are star-forming regions where the process of star formation is still ongoing. These protostars are typically embedded within dense clouds of gas and dust, making them difficult to observe directly. However, their presence can be inferred from various signatures such as infrared emission from heated dust and molecular line emission. As these protostars continue to accrete mass from their surrounding material, they will eventually reach a point where nuclear fusion ignites in their cores, marking the transition from protostar to main-sequence star.

Some Young Star Clusters Contain Large Numbers of Protostars