9. What temperature should the cores of protostars exceed to become main sequence stars? As bromley als roma Baub siman a. 10,000 K b. 100,000 K c. 1,000,000 °C 10. What are nebulae made up of? a. comets b. dark matter zirenogrado adt 916 isdW. C. ausko Milky W d. 1,000,000 K 10,000,000 K Way wobbling both e. Vgrans 15ebunt. d. light c. interstellar clouds bis mygt foient motor 250b wor - 11. Which are stars that expand when they burn heavier elements in their cores and release a tremendous amount e. supernova a. dwarf stars b. interstellar clouds "enicis owl to daigrons edt griniamos Chur sine ovolni ausbun simtoon srbi nibed planets e. amount of energy? d. red giants

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