Question 1 · You can calculate a star's luminosity if you know its brightness and · · · size · · · distance · · · temperature · · · velocity · · · mass · 2 points Question 2 · A/an _______ star is a binary star in which the orbit plane of the two stars lies almost exactly in the line of sight of the observer. · · · Apparent double star · · · Eclipsing binary · · · spectroscopic binary · · · true binary · · · visual binary · 1 points Question 3 · Two nearby stars that look like members of a binary star system but are not are called a(n) · · · visual binary · · · true binary · · · Eclipsing binary · · · spectroscopic binary · · · Apparent double star · 1 points Question 4 · A map of the Sun’s magnetic field is called · · · Solar seismology · · · Magnetogram · · · Dopplergram · · · Magnetic resonance imaging · · · None of the above · 1 points Question 5 · A(n) ______ is an explosion of hot gas located in the Sun's atmosphere. · · · Aurora · · · Coronal mass ejection · · · Flare · · · Prominence · · · Sunspot · 1 points Question 6 · How many years a star spends in the main - sequence stage depends on its ________. · · · Density · · · Luminosity · · · Mass · · · Temperature · · · Color · 1 points Question 7 · ____ form when red giants shed their outer layers. · · · Supernovae · · · Novae · · · Black holes · · · planetary nebulae · · · Protostars · 1 points Question 8 · The pressure-temperature thermostat regulates a star's · · · mass · · · gravity · · · size · · · fusion rate · · · rotation speed · 2 points Question 9 · When the mass of a white dwarf becomes less than the Chandrasekhar limit, it will collapse. True False 1 points Question 10 · When mass is being transferred from a companion star, the spiral structure around the white dwarf from the mass falling into it is called a/an · · · Accretion disk · · · Light curve · · · Roche lobe · · · Supernova remnant · · · Thermonuclear runaway · 1 points Question 11 · Cepheids can be detected further away than RR Lyrae stars. True False 1 points Question 12 · _____ are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy. · · · Cepheid variables · · · novae · · · supernovae · · · variable stars · · · yellow giants · 1 points Question 13 · Which of these is a Type Ia Supernova? · · · two stars colliding · · · a red supergiant ejecting its outer layers · · · a thermonuclear runaway on the surface of a white dwarf in a binary star system · · · a massive star undergoing core collapse · · · an explosion that destroys a white dwarf in a binary star system · 2 points Question 14 · Which of the following statement ...