The HR diagram below shows how the brightness, surface temperature, and color of stars are related Hertzsprung-Russell Diagram
Blue
10,000 suns
Supergiants
Red
100 suns
White
Giants
Brightness
1 sun
Yellow
Orange
0.01 sun
Barnard's Star
White warts
Red
50,000 25.000 11,000 7,800 6,300 5,300 3.800
Surface Temperature (K)
Which of these observations of Barnard's Star is most likely accurate?
Barnard's Star is less bright than the sun, has a surface temperature above 3.800 K. and is red
Barnard's Star is less bright than the sun, has a surface temperature below 3 800 K. and is red
Barnard's Star is brighter than the sun, has a surface temperature below 5.300 K and is yellow