Except for Hydrogen and Most of the Helium, All the Elements

Q18: Why were neutrinos detected from Supernova 1987A

Q19: Why should the youngest stars be made

Q20: When observing a star that increases dramatically

Q21: The supernova that formed M-1, the Crab

Q22: The total energy emitted by the brightest

Q24: What is the only element in your

Q25: An iron core will collapse in approximately

Q26: The Crab Nebula is a bright, long-lasting

Q27: An iron core cannot support a star

Q28: In a nova, there is a white