PSU ASTRO 1 Exam 3 Study Guide | Questions with 100% Correct Answers | Verified | Latest Update 2024

Explain how a white dwarf's observable properties (specifically Luminosity & Temp) change over billions of years if it is left alone, and show how its location would change on an H-R diagram. - •White Dwarfs are low-mass stars, and if they are left alone, they will fade and cool forever. •If mass transfer adds mass to a White Dwarf, it can become, (1) a Nova, or (2) a Supernova Compared to a white dwarf, a neutron star's density is? - •Not all neutron stars are called pulsars because not all neutron stars send this signal in a direction that astronomers can detect them. Which statement is necessarily true? A. Every pulsar is a neutron star B. Every neutron star is a pulsar C. both - A. Every pulsar is a neutron star Compared to a neutron star, a black hole's density is? - If our Sun were suddenly compressed to a black hole (BH) of the Sun's same mass, Earth would... - maintain the same orbit What happens to as you get closer and closer to the center of a black hole (BH)? - It increases without bound How long does it take light to travel from the center of our galaxy to us? - 25,000 years