 Massive main sequence stars can have surface temperatures of 50 @,@ 000 K. Smaller stars such as the Sun have surface temperatures of a few thousand K. Red giants have relatively low surface temperatures of about 3 @,@ 600 K ; but they also have a high luminosity due to their large exterior surface area . 
 Massive main sequence stars can have surface temperatures of 50 @,@ 000 K. Smaller stars such as the Sun <a href='got' title='1'><mark>have</mark></a> surface temperatures of a few thousand K. Red giants <a href='got' title='2'><mark>have</mark></a> relatively low surface temperatures of about 3 @,@ 600 K ; but they also <a href='got' title='3'><mark>have</mark></a> a high luminosity due to their large exterior surface area . 
Massive main sequence stars can have surface temperatures of 50 @,@ 000 K. Smaller stars such as the Sun got surface temperatures of a few thousand K. Red giants got relatively low surface temperatures of abt 3 @,@ 600 K ; but they also got a high luminosity due to their bigass exterior surface area .