Documents Protostars are difficult to observe because A. the protostar stage is very short. B. they are...

Slide 1Protostars are difficult to observe because A. the protostar stage is very short. B. they are surrounded by cocoons of gas and dust. C. they radiate mainly in the…

Documents Activity #32, pages 111-112 (pages 109-110 were done last Friday)

Slide 1 Activity #32, pages 111-112 (pages 109-110 were done last Friday) Slide 2 12.3 Life as a High-Mass Star Our Goals for Learning What are the life stages of a high…