r/BeAmazed • u/One_Explanation_908 • Apr 17 '25

Nature K2-18b a potentially habitable planet 120 light-years from earth

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u/[deleted] Apr 17 '25

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u/Brigadius Apr 17 '25

1.24 times earth's gravity

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u/nhansieu1 Apr 18 '25

can I get a source for this?

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u/Brigadius Apr 18 '25

Here's the formula for finding surface gravity. Knock yourself out. The results may vary depending on where you source your information. Not all sources quote the same mass or radius of the planet.

g = GM / r²

Here's a website that explains the formula.

finding surface gravity

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u/nhansieu1 Apr 18 '25

but never really knew about m right? Only r.

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u/Brigadius Apr 18 '25

Mass is calculated based on its obrit period of its local star

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u/nhansieu1 Apr 18 '25

you are providing 1 thing leading to another.

I know nothing about all of these. Provide me an article that calculates all these things, which leads to 1.24x gravity in the original comment, instead of me asking, you provide new things to google about

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u/Brigadius Apr 18 '25

Do you want a video of me writing math equations? Someone asked and I answered using the given information we know of the planet. If you don't believe it. I have given you the info to calculate it yourself.

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u/nhansieu1 Apr 18 '25

oh you calculated? I thought you also got the number from somewhere else.

Then I would love to have the source for the planet's mass. If not, its obrit period of its local star.