 The combination of the radius and the mass of a star determines its surface gravity . Giant stars have a much lower surface gravity than do main sequence stars , while the opposite is the case for degenerate , compact stars such as white dwarfs . The surface gravity can influence the appearance of a star 's spectrum , with higher gravity causing a broadening of the absorption lines . 
 The combination of the radius and the mass of a star <a href='uninflect' title='1'><mark>determines</mark></a> its surface gravity . Giant stars <a href='got' title='2'><mark>have</mark></a> a much lower surface gravity than do main sequence stars , while the opposite <a href='drop_aux' title='3'><mark>is</mark></a>the case for degenerate , compact stars such as white dwarfs . The surface gravity can influence the appearance of a star <a href='null_genetive' title='4'><mark>'s</mark></a>spectrum , with higher gravity causing a broadening of the absorption lines . 
Da combination of tdaradius and the mass of a star determine its surface gravity . Giant stars got a much lower surface gravity than do main sequence stars , while thdapposite the case for degenerate , compact stars such as white dwarfs . Thedarface gravity can influence the daearance of a star  spectrum , with higher gravity causing a broadening of the adarption lines .