Astronomy college course/Introduction to stellar measurements/questions/Supplement

{Our Sun is an approximate black body with a peak wavelength at approximately 500nm. If &lambda; is the peak wavelength, then the absolute temperature (i.e., Kelvins) is related to &lambda; by &lambda;T = k, where k is a constant. An object emits thermal (blackbody) radiation with a peak wavelength of 250nm. How does its temperature compare with the Sun?} - 5 times colder than the Sun - 2 times colder than the Sun - 5 times hotter than the Sun - The temperature is the same + 2 times hotter than the Sun

{Our Sun is an approximate black body with a peak wavelength at approximately 500nm. If &lambda; is the peak wavelength, then the absolute temperature (i.e., Kelvins) is related to &lambda; by &lambda;T = k, where k is a constant. An object emits thermal (blackbody) radiation with a peak wavelength of 1000nm. How does its temperature compare with the Sun?} - 5 times colder than the Sun + 2 times colder than the Sun - 5 times hotter than the Sun - The temperature is the same - 2 times hotter than the Sun

{Our Sun is an approximate black body with a peak wavelength at approximately 500nm. If &lambda; is the peak wavelength, then the absolute temperature (i.e., Kelvins) is related to &lambda; by &lambda;T = k, where k is a constant. An object emits thermal (blackbody) radiation with a peak wavelength of 100nm. How does its temperature compare with the Sun?} - 5 times colder than the Sun - 2 times colder than the Sun + 5 times hotter than the Sun - The temperature is the same - 2 times hotter than the Sun

{The distance to a star in parsecs is related to a planet's parallax angle, &theta;, by the formula, d = r/&theta;, where d is measured in parsecs, r is the radius of the planet's orbit in AU, and &theta; is the parallax angle in arcseconds. 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?} + 25 parsecs - 5 parsecs - 50 parsecs - 1 parsec - e) 10 parsecs

{The distance to a star, d, is related to a planet's parallax angle, &theta;, by the formula, d = r/&theta;, where r is the radius of the planet's orbit, and &theta; is the parallax angle measured in radians. An orbiting satellite makes a circular orbit 5 AU from the Sun. It measures a parallax angle of 1 arcsecond (each way from the average position). What is the star's distance?} - 25 parsecs + 5 parsecs - 50 parsecs - 1 parsec - 10 parsecs

{The distance to a star, d, is related to a planet's parallax angle, &theta;, by the formula, d = r/&theta;, where r is the radius of the planet's orbit, and &theta; is the parallax angle measured in radians. An orbiting satellite makes a circular orbit 5 AU from the Sun. It measures a parallax angle of 0.1 arcsecond (each way from the average position). What is the star's distance?} - 25 parsecs - 5 parsecs + 50 parsecs - 1 parsec -10 parsecs