I’m Hunter Perrin. I’m a software engineer.

I wrote an email service: port87.com

I write free software: github.com/sciactive

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hperrin ,

I mean, no, not really. The gravitational center of the sun-earth system is within the sun itself, so the earth definitely orbits the sun and the sun definitely does not orbit the earth. Let alone the fact that the sun’s movement is predominantly driven by Jupiter. (The gravitational center of the sun-Jupiter system is just above the sun’s surface.)

hperrin ,

I would not call it orbiting if the center is within the body. So, since the center of the sun-Jupiter system is just outside the surface of the sun, I would say the sun and Jupiter orbit the center of their system, but since the center of the sun-earth system is within the body of the sun, I would not say the sun orbits the center of this system. The path the sun takes in this system is entirely contained within its body.

Now, since the sun, Jupiter, and earth are all in the same system, there’s even less reason to say the sun orbits the earth, since the earth has a negligible effect on the sun’s motion.

hperrin , (edited )

Then literally everything is orbiting literally everything else, and the word orbit is completely useless.

I have a gravitational effect on the earth. The earth-hperrin system has a gravitational center that both bodies revolve around. Does that mean the earth and I orbit that center? No, because my effect on the earth is negligible. The absolutely immeasurably small wobble my mass gives the earth is not an orbit. There are bodies much more massive than me that the earth orbits (despite how many Doritos I eat).

To put in less hyperbolic terms, Mars’ moon Phobos and Mars have a gravitational center, deep deep deep within the Martian core that both bodies revolve around. Does that mean Mars orbits this point? I don’t think a reasonable person would say so. A massive body wobbling because of a small body orbiting it is not orbiting. Only one thing in such a system is orbiting.

hperrin ,

One can only predict that rabbit poop is delicious.

hperrin ,

If you want to comment someone forever, just do this symbol with your hands:

/*

hperrin ,

Your answer is a little misleading. I think you meant there are several stars that close to us, but none that can go supernova.

hperrin ,

The Konsole icon is greater than most.

hperrin ,

Wait, again again, or just again? How many times has he lost now?

hperrin ,

“Price includes 4 walls. Roof is extra.”

hperrin ,

I saved for a few years, and every amount I saved was offset by the housing prices going up. I eventually had $300K saved up and couldn’t afford the down payment on a family home.

That’s just completely and utterly unsustainable. I live in San Diego County now, which isn’t a whole lot better.

hperrin ,

Wow, two bedrooms for only $1.5mil! What a steal!

hperrin ,

The GOP is really in disarray right now. Good.

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