Main sequence
stars there called stars
Of course they are on the HR diagram. They are simply not on the main sequence.
The colors of the HR Diagram are:BlueBlue-WhiteYellowOrangeRed-OrangeRed
The red dwarves.
Several regions of the HR diagram have been given names, although stars can occupy any portion. The brightest stars are called supergiants. Star clusters are rich in stars just off the main sequence called red giants. Main sequence stars are called dwarfs.
Nebulae themselves are not directly plotted on the Hertzsprung-Russell (HR) diagram, which is a graphical representation of stars based on their luminosity and temperature. However, nebulae are often the regions where stars form, and the stars that emerge from these nebulae can be represented on the HR diagram. The HR diagram primarily focuses on the evolutionary stages of individual stars rather than the nebulae from which they originate.
stars there called stars
stars there called stars
The HR diagram contains only stars - so everywhere.
Of course they are on the HR diagram. They are simply not on the main sequence.
The curve that currently contains most stars on the HR diagram is called the "main sequence". It consists of those stars that fuse hydrogen-1, converting it into helium-4.
The HR diagram classifies stars based on their luminosity (or absolute magnitude) and their surface temperature (or spectral class). Luminosity is plotted on the vertical axis, while surface temperature is represented on the horizontal axis, typically decreasing from left to right. This diagram helps illustrate the relationship between a star's temperature, brightness, and evolutionary stage.
All stars.
The location on the Hertzsprung-Russell (HR) diagram where most stars lie is known as the main sequence. The HR diagram is a plot of stellar luminosity against surface temperature. The main sequence is a prominent band that extends diagonally across the HR diagram from high temperature and high luminosity to low temperature and low luminosity. The majority of stars, approximately 90% of all stars, are situated along the main sequence on the HR diagram. These stars are often referred to as main-sequence stars. They exhibit a smooth relationship between surface temperature and luminosity, with varying sizes and masses but sharing this common characteristic of lying on the diagonal band from the upper left to the lower right of the HR diagram. Source: Teach Astronomy - The Hertzsprung-Russell Diagram
main-sequence stars
The colors of the HR Diagram are:BlueBlue-WhiteYellowOrangeRed-OrangeRed
The red dwarves.