Most of the stars in the main sequence are to the lower right of the sun what can you conclude about the brightness of these stars and their temperatures?

Answer 1

Main Sequence stars can be any spectral class of star. Something that might help you in the future is when you look up a star and see its spectral class, its always followed by a roman numeral to define where the star is in its life and size and they go as follows.

I-a= A hyper Giant Star

I-b= A very bright Super Giant star

I= A normal Super Giant star

II= Bright Giant star

III= Giant star

IV= Sub Giant star

V= Dwarf Star(which this is where most main sequence stars fall into, While a main sequence star could also be one of the classifications listed above. it just depends on its spectral class. for example the star Deneb is in its main sequence still and its classified as a hyper giant)

VI= Sub Dwarfs (this is a very rare classification and are mostly used for brown dwarfs.

I hope this helps mate.

Answer 2

Stars on the lower right of the main sequence are less bright and cooler than the Sun. This indicates that they are smaller and less luminous than the Sun, with lower surface temperatures.