Protostars are young, developing stars that are still in the process of forming. They are typically surrounded by a dense cloud of gas and dust, which is gradually pulled in by the force of gravity to eventually form a fully-fledged star. Protostars go through several stages of evolution, starting as a dense core in a molecular cloud and eventually developing into a more stable star. Studying protostars can help us better understand the processes of star formation and the early stages of stellar evolution. Researchers in this area may use observational data from telescopes to study the physical properties and evolution of protostars, as well as theoretical models to simulate their formation and development.