Can a planet be as large as the star that it orbits? Recent observations have discovered that nearby Van Biesbroeck\’s star might have just such a large planet.
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A Large Planet Orbiting a Small Star
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Sure it can, but can it be more massive? O_o
Negatory – if it had the same mass as the star it would ignite fusion in its core and become the 2nd half of a new binary star system, rather than just a planet.
Your impeccable logic reminds me to not be so oblique in future posts.
In other news: brown dwarfs are pretty weird:
astro.berkeley.edu/~stars/bdwarfs/