wolf, moon, tree @ Pixabay

Which star lives longer: A high-mass star or a low-mass star?

The answer to this question is not so straightforward. For one thing, it depends on the size of the stars and how much “fuel” they have. A high-mass star has more fuel than a low-mass star. So which will live longer? This is an interesting question with many different factors that come into play.

north star, stars, night @ Pixabay

To understand the answer better, let’s take a look at some of these factors. – A low-mass star has a bigger surface area than a high-mass star. This means that the gravitational force at its core is stronger, so it can keep burning for longer periods of time even after nuclear fusion begins to slow down.

The colour of the stars also plays an important role in determining which one will burn out first. Low-mass stars are red giants while high mass ones are blue/white giants or supergiant (depending on their size). Red giants have cooler cores and emit less energy than blue-white giants, so they tend to last longer as well.

Emma Smith: I am considering making this post into bullet points because it’s too long – each sentence should be no more.

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