This process often begins when radiation from a massive celestial body drives a compression wave into a cloud, evaporating the outer layers(+)  
TheRDImodelisusedtodescribethisprocess.Kroupasuggestedthreedifferentvaluesforadimensionless exponent in his initial mass function he used to describe this process. A good example of how to model this process is a region in the Milky Way located about 2400 light years away from Earth known as (^)  Cepheus B. This process often begins when radiation from a massive celestial body drives a compression wave into a cloud, evaporating the outer layers(+)  of that cloud while triggering this process in the interior. Matter ejected during this process collides with the interstellar medium, creating (*)  Herbig-Haro objects. This process which takes place inside of Bok globules typically results in the creation of protoplanetary disks. For 10 points, name this process which takes place in stellar nurseries and gives birth to new celestial objects such as Betelgeuse and the Sun.
TheRDImodelisusedtodescribethisprocess.Kroupasuggestedthreedifferentvaluesforadimensionless exponent in his initial mass function he used to describe this process.
star formation  [accept word forms or anything relating to the birth of stars, also accept specific types]