What is the composition of nebulae, according to the text?
Answer
Predominantly hydrogen and helium gas
Nebulae are predominantly composed of hydrogen and helium gas, accompanied by trace amounts of heavier elements in the form of dust grains.
Related Questions
What is the fundamental cause driving the concentration of mass in nebulae?What physical process generates heat during the initial phase of gravitational cloud collapse?What state of balance marks the transition from a collapsing protostar to a main-sequence star?What is the composition of nebulae, according to the text?What effect does the conservation of angular momentum have during the gravitational collapse of a nebula?What term describes the dense, hot core formed during the initial stages of gravitational contraction?What must gravity overcome for a sparse gas cloud to begin its contraction phase?What is the result if a collapsing core's mass is too low to achieve sustained core fusion temperatures?What characteristic of the early protostar dictates its subsequent lifespan and luminosity on the main sequence?How does reaching the opacity threshold affect the heating rate in the core of a collapsing nebula?