ASTRONOMY EXAM #3- TAMU EXAM QUESTIONS AND ANSWERS 100% CORRECT!!

The visible surface of the sun is located at ________________. - ANSWER the photosphere In which zone is the energy transported outward by rising hot gas and falling cold gas? - ANSWER convection zone The ___________ is how hydrogen fuses into helium in the sun. - ANSWER proton-proton chain Why is Supernova 1987A particularly important to astronomers? - ANSWER It was the nearest supernova detected in nearly 400 years. Observationally, how can we tell the difference between a white-dwarf supernova and a massive-star supernova? - ANSWER The spectrum of a massive-star supernova shows prominent hydrogen lines, while the spectrum of a white-dwarf supernova does not. What kind of pressure supports a white dwarf? - ANSWER electron degeneracy pressure Degeneracy pressure stops the crush of gravity in all the following except - ANSWER a very massive main-sequence star Which of the following is closest in mass to a white dwarf? - ANSWER the Sun