Astronomy college course/Introduction to stellar measurements/questions/Original version of this quiz

Questions based on Introduction to Stellar Measurements
{Stellar parallax is } + an annual change in angular position of a star as seen from Earth - an astronomical object with known luminosity. - the total amount of energy emitted per unit time. - a numerical measure of brightness as seen from Earth - a numerical measure of brightness as seen from a distance of approximately 33 light-years

{Luminosity is } - an annual change in angular position of a star as seen from Earth - an astronomical object with known luminosity. + the total amount of energy emitted per unit time. - a numerical measure of brightness as seen from Earth - a numerical measure of brightness as seen from a distance of approximately 33 light-years

{A standard candle is} - an annual change in angular position of a star as seen from Earth + an astronomical object with known luminosity. - the total amount of energy emitted per unit time. - a numerical measure of brightness as seen from Earth - a numerical measure of brightness as seen from a distance of approximately 33 light-years

{Absolute magnitude is } - an annual change in angular position of a star as seen from Earth - an astronomical object with known luminosity. - the total amount of energy emitted per unit time. - a numerical measure of brightness as seen from Earth + a numerical measure of brightness as seen from a distance of approximately 33 light-years

{Relative magnitude is} - an annual change in angular position of a star as seen from Earth - an astronomical object with known luminosity. - the total amount of energy emitted per unit time. + a numerical measure of brightness as seen from Earth - a numerical measure of brightness as seen from a distance of approximately 33 light-years

{In 1989 the satellite Hipparcos was launched primarily for obtaining parallaxes and proper motions allowing measurements of stellar parallax for stars up to about 500 parsecs away, which is about ____ times the diameter of the Milky Way Galaxy.} + .015 - 0.15 - 1.5 - 15 - 150

{An object emits thermal (blackbody) radiation with a peak wavelength of 250nm. How does its temperature compare with the Sun? } - The temperature is the same - 2 times colder than the Sun + 2 times hotter than the Sun - 5 times colder than the Sun - 5 times hotter than the Sun

{The "normalized intensity" of a Sun-like star situated one parsec from Earth would be 4&pi;I = 1. What is 4&pi;I for a star with 100 times the Sun's energy output that is situated 10pc from Earth?} - 10-2 - 10-3 - 10-1 - 10-4 + 1

{An orbiting satellite makes a circular orbit 5 AU from the Sun. It measures a parallax angle of 0.2 of an arcsecond (each way from the average position). What is the star's distance? } - 10 parsecs + 25 parsecs - 5 parsecs - 1 parsec - 50 parsecs

{A star that is increasing it's temperature while maintaining constant luminosity is} + getting smaller in size - turning red - in the process of dying - on the verge of becoming a supernovae -e) getting larger in size

{The range of wavelength for visible light is between} + 400 and 700 nanometers - 1 and 10 nanometers - 600 and 1200 nanometers - 0.1 and 10 nanometers - 5000 and 6000 nanometers

{Based on the HR diagrams and images in stars shown in the materials, a very large red supergiant has a diameter that is about ____ greater than a small white dwarf.} - 3x103 - 3x109 - 3x1011 - 3x107 + 3x105