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Those stars are called brown dwarves.

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15y ago

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Is Jupiter close to becoming a star?

Jupiter was going to become a star but when studied closely, scientists found that it was not massive enough to cause nuclear fusion in its core


Are gassy planets really planets?

Yes! As long as it is massive enough to form a spherical shape with it's own gravity, and not so massive that it becomes a star, and revolves around a star itself, it is considered a planet.


If a star is massive enough what can result after it produces a supernova?

If a star is massive enough, after it produces a supernova it can either leave behind a neutron star or collapse into a black hole, depending on the mass of the original star.


What causes a planet to become a star?

A planet cannot become a star. A star is an object that is massive enough to release energy via nuclear fusion. A planet is much less massive.


What difference of a star and a planet?

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What will happen to a star once all its fuel is gone?

The answer depends on the original mass of the star. If it was not too massive, it will shrink to a dwarf star. If it was sufficiently massive, it will explode as a nova. A really massive star, exploding as a supernova, will leave behind either a neutron star, a pulsar or a black hole.


Why is planet Saturn a planet and not a star?

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Can our sun become a neutron star?

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Is the sun a massive star or a dwarf star?

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What is a massive collapsed star?

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When a protostar dies it turns into what?

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How long a star lives and what it becomes at the end of its life depend primarily on?

size