The colour is indicative of the temperature and the spectral class — white stars are (main-sequence) A and F dwarfs; yellow stars like the Sun are G dwarfs; orange stars are K dwarfs; and red stars are M dwarfs, by far the most common type of star in the solar neighbourhood.
-- There are three types of binaries: visual, which means you can actually see the two stars in a telescope (no orbiting binaries have a wide enough separation to be seen with the naked eye); spectroscopic, which means you can see the presence of the orbit due to the Doppler shifting of the stellar spectral lines; and ...
Main sequence stars are hydrogen-burning stars like our Sun. More massive main sequence stars are hotter, and are found at the top left of the strip. Less massive stars are cooler, and are found at the bottom right. Massive stars burn through all their hydrogen quickly, in only a few million years.
It is customary to plot H–R diagrams in such a way that temperature increases toward the left and luminosity toward the top.
Red dwarfsRed dwarfs are by far the most common type of star in the Milky Way, at least in the neighborhood of the Sun, but because of their low luminosity, individual red dwarfs cannot be easily observed.
Binary star system is the correct answer .Nov 20, 2018
TYPEStarIILuminous giantsIIIGiantsIVSubgiantsVMain sequence stars (dwarf stars)4 more rows
What characteristic do all stars on the main sequence share? They are all fusing hydrogen into helium in their cores.Dec 11, 2021
What is the common trait of all main sequence stars? They generate energy through hydrogen fusion in their core.
Since stars are plotted on the H-R diagram by absolute magnitude and/or luminosity and surface temperature (stellar classification), each star is plotted as one data point. Main sequence stars, giants and supergiants, and white dwarfs all occupy specific branches on the diagram.
The H-R Diagram plots stars such that there are four major groups. The Supergiants are cool stars, which are very large and very bright. They are located towards the top right of the graph. The Giants are cool stars, which are a little smaller and dimmer than the Supergiants.
On the diagram stars are ranked from bottom to top in order of decreasing magnitude (increasing brightness) and from right to left by increasing temperature (spectral class). Stars of the galactic arm in which the Sun is located tend to fall into distinct regions on the diagram.