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It grows to such an extended size that it exceeds the standard dimensions of the page,

and a fold-out is required.

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13y ago
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12y ago

red giant star

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Q: What forms when a main sequence cools and expands?
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What forms when a main sequence star that has been contracting suddenly cools and expands?

A red giant forms when a main sequence star that has been contracting suddenly expands and cools.


Is a red giant a main sequence star?

No, a red giant is a star that has just left the hydrogen burning main sequence and begun the next step, burning helium. As helium undergoes fusion at a much higher temperature than hydrogen undergoes fusion, the star expands dramatically and as it expands its outer layers cool to red heat.


What type of star forms the majority of visible stars in the sky?

Main Sequence Stars


What is the past and probable future of the sun?

In the past it was a main sequence star. In the future it will be a giant star and will cool off.


What inevitably forces a star like the Sun to evolve away from being a main sequence star?

Helium builds up in the core, while the hydrogen burning shell expands.


What most stars are classified as?

Main Sequence


Where is the sun in its main sequence stage?

its to the right of the middle of the main sequence.


What are the two stars that are not in the main sequence?

There are billions of stars that are not on the main sequence.


Name an example of a main sequence?

The sun is a main sequence star


Do red main sequence stars have the highest surface temperature?

No. They have the lowest temperatures on the main sequence. The hottest main sequence stars are blue.


What is the main sequence temperature?

The temperature of main sequence stars can vary quite a bit.


Where is Hamal on the main sequence?

Unfortunately, it is impossible to tell accurately where a star is on the main sequence.