Wednesday, 27 May 2015

Wormholes: Basic Gravity

... or just making sure the laws of Physics are consistent in the cluster before going forward.

I had to do maths today, so to make up for it, here's a picture of the ISV Rhys Tai, my current ship.

Beautiful shot of Caroline's Star in the background.

I started with the assumption that gravity as we know it still applies to New Eden. If I were thinking meta-game, I doubt the developers would create a whole new set of Physics to create their universe. However, a lot of Physics does come down to constants, and once the equations are set, it's relatively easy to sneak some curve balls in in there.

So. Basic gravity.

The force of attraction due to masses of objects is ancient science.

These laws were laid down before even the Amarr and Khanid got off our planet. How they weren't lost under a deluge of religious dogma, I don't know. I can only hope reverence for the EVE Gate made such advances possible. But I digress.

The equation is relatively simple:

This is where m1 and m2 refer t the objects being attracted to each other, and r is the distance between them. G is a universal constant, used to equate mass, distance and force. And that's what we just need to test now. 

If that G constant is different then we essentially need to start all over again understanding New Eden Physics. Happily, testing it really isn't that hard for a capsuleer! 

The part of the equation we need to test is this bit in red:

This bit describes our surface acceleration on a planet.You might have seen this as a 'g' back in school (usually as a very human friendly 9.8m/s^2).

As capsuleers, our pod and ship sensors give us access to a whole bucket load of information we'll never need. Fly out to a planet, and check its information, and you can get its mass, radius, and even its surface gravity. Which means we can safely check our equations work, without too much hassle.

So that's what I did. 

These are some planets in the Shamahi system. Low-sec in case you were wondering. There's also Shamahi 9 up in the first picture of this post. Well done to Angry Gamers Incorporated for securing some POCOs in this system!

I checked the data, did the maths, and good news! Our basic equations for gravity, and the constants used hold up in the cluster... at least for this system. To be sure, we still need to check if this holds up in more exotic spaces (wormholes and Thera in particular).

But for now, I'm satisfied that my basic understanding of gravity can be applied in New Eden. I wasn't really expecting to find anything different, but it's always a good idea to check the basics before running off into black holes.

Now for General Relativity, and seeing which parts match up to our wormholes.

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