Mona is an astronomer who looks at stars for a living. If she is observing how hot certain stars are and she notices that one is cooler then the others, what does that say about the brightness of that star?
it's dimmer it's brighter
A B
The hotter a main sequence star is, the brighter it is.
brighter
hotter
brighter
MORE
MORE
hotter a main sequence star
brighter
dimmer
star
star
star
star