Which of these stars has the coolest surface temperature? a. a starb. f starc. g stard. k star

D. K star

Explanation:

Stars are classified into different groups according to their peak wavelength and their surface temperature.

In particular, we have the following group of stars, which correspond to the following surface temperatures:

Group O - Temperature > 25,000 K

Group B - Temperature 11,000 - 25,000 K

Group A - Temperature 7,500 - 11,000 K

Group F - Temperature 6,000 - 7,500 K

Group G - Temperature 5,000 - 6,000 K

Group K - Temperature 3,500 - 5,000 K

Group M - Temperature < 3,500 K

So among the options given, the star with the coolest surface temperature is star in group K.

would be false hope this out

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..