some stars are hotter than others because they have more hydrogen to use and create heat with. BTW- answered by a 6th grader.
None of them are cool and dim; the one in the white/black dwarfs are cool and dim.
There are billions of stars that are not on the main sequence.
No. All stars are hot. For stars on the main sequence, the largest it is, the hotter it is. When a star leaves the main sequence to become a giant or supergiant it will cool down, but will remain hot enough to glow brightly.
The lower right part of the main sequence in the Hertzsprung-Russell diagram contains the stars that took the longest to reach the main sequence. These stars are low mass and cool, so they undergo a longer contraction phase before they start fusing hydrogen in their cores and settle onto the main sequence.
Correct. M-type stars on the main sequence are called red dwarfs.
The smallest stars in the main sequence are the stars with cooler surface temperatures.
"main sequence" is the tern.
main sequence stars , our sun is also a main sequence star
No. They have the lowest temperatures on the main sequence. The hottest main sequence stars are blue.
Main Sequence
Main sequence stars are found in all galaxies.
Main sequence stars.