Question

From disk to star, the transition occurs after the cloud condenses into a:

a) Nebula
b) Protostar
c) Supernova
d) Quasar

Answer 1

The transition from a cloud to a star occurs after the cloud condenses into a protostar.

Step-by-step explanation:

The transition from a cloud to a star occurs after the cloud condenses into a protostar. When a cloud of gas and dust collapses under its own gravitational force, it forms a protostar. The protostar then continues to shrink and heat up until it reaches a point where it can sustain nuclear fusion, becoming a fully formed star. The transition from a disk to a star occurs after the cloud condenses into a protostar. Initially, a vast cloud of gas and dust, known as a nebula, undergoes gravitational collapse. Within this nebula, a region forms a protostar as it accumulates mass. During this phase, the protostar is not yet a full-fledged star but is on the path to becoming one. As gravitational forces continue compressing the material, the protostar reaches a critical temperature and pressure, triggering nuclear fusion. This marks the transformation into a stable, luminous star, where sustained fusion reactions in its core produce light and energy.