A star that is several thousand times brighter than the Sun with a lower temperature than 4000K would be classified as-
Even though stars are not a living things, they have a life cycle. They go through various stages of change as they age, kind of like people do. We talked before about how all stars start out forming in a nebula. Stars spend the majority of their time on an area of the HR Diagram known as the Main Sequence.
The Main Sequence is where you will see the majority of the stars on the HR Diagram.
Our Sun has been on the Main Sequence since it formed.
Our Sun will become a Red Giant in about 4.5 billion years. Our Sun is not massive enough to become a Supergiant.
The Sun will eventually shrink down into a White Dwarf, about the size of the Earth. The Sun will spend billions of years as a White Dwarf.
Watch the video below to see why these changes happen.
The Sun is in Area P, the Main Sequence. The next stage of the Sun's life cycle will be in Area X, the Red Giants. What will change about the temperature and luminosity of the Sun when it moves to Area X from Area P?
**You do need to know where the Sun is located on the HR Diagram.
Handy dandy HR Diagram key
The Sun will move to the right into Area X which means the temperature of the Sun will decrease. The Sun will also move closer to the top of the HR diagram in Area X, so it will be brighter.
When You Have Completed the Question Below, Click Next
A star that is several thousand times brighter than the Sun with a lower temperature than 4000K would be classified as-
a white dwarf in Spectral Class B
a main-sequence star in Spectral Class K or M
supergiant in Spectral Class K
a main-sequence star in Spectral Class F