System Information

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System Information

Postby Gibraltarica » Mon Feb 08, 2016 12:43 am

Ya'ng (The Sun)
About 1.1 times the size of the sun Earth orbits. It is white, and relatively middle-aged.

Mei (Beautiful)
A small, rocky planet about 62% the diameter of Terra, about .2 AU away from Ya'ng. It has surface temperatures of close to 1100 degrees, and is mostly comprised on the surface of heavy metals, carbon, and iron. It is colored a dark red color due to its composition. It is 78% the mass of Terra. It has a day 204 days in length, and a year 45 days long.

Xiin (Heart)
A slightly larger rocky planet about 104% the diameter of Terra, but only 92% its mass due to low iron content. It has high levels of silica and lighter compounds in its surface. It is .45 AU away from Ya'ng, and has an atmosphere composed primarily of superheated noble gases. It has surface temperatures of about 600 degrees. It has almost the exact same year and day, both at about 234 days.

Shu*i (Water)
Called so because of large amounts of cobalt compounds in the atmosphere, turning it blue, it is a smaller planet, with a diameter and mass 56% that of Terra, and is about .76 AU away from Ya'ng. It has high levels of cobalt, iron, nickel, and possibly iridium, osmium, and rare earth metals.

Terra
1.12 AU away from Ya'ng, with a diameter and mass almost exactly that of Earth, the planet has a core of a combination of liquid and solid iron and nickel, with a mantle with diverse compounds.

The Asteroid Belt
The asteroids in this asteroid belt add up to about 40% of Terra's mass, and are mostly composed of iron, ice, and basalt, with high content of heavy and rare earth metals. It is located between Terra and Wa*ng

Wa*ng (King)
A gas giant 350 times the mass and 12 times the diameter of Terra, it is 7 AU away from Ya'ng. It is comprised of light gases, but has over 100 satellites, some of which could theoretically support life.

Fu* (Father)
A gas giant 81 times the mass and 10 times the diameter of Terra, it is 11 AU away from Ya'ng. It is comprised of light gases, and has similar satellites to Wa*ng, but has only 72.

Ha~i (Sea)
A gas giant 8.3 times the mass and 3 times the diameter of Terra, and 29 AU from Ya'ng, it has 8 satellites and a similar composition to the other gas giants.

The Outer Asteroid Belt
With many dwarf planets and asteroids, the outer asteroid belt extends out to .5 lightyears, and the cloud beyond it extends out 4 lightyears.
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Re: System Information

Postby ProfessorHenn » Mon Feb 08, 2016 1:56 pm

Yáng
Mei
Xîn
Shüi
Terra
Wäng

Hāi

This makes it look much neater.
Signed,

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Re: System Information

Postby Xah » Mon Feb 08, 2016 2:24 pm

A nice graphical comparison of sizes, all to scale
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Re: System Information

Postby Wuufu » Mon Feb 08, 2016 3:11 pm

This looks good :)
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Re: System Information

Postby Gibraltarica » Mon Feb 08, 2016 10:29 pm

Glad you all like it! If you have any complaints/suggestions, please feel free to ask away!
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Getting around the system

Postby Xah » Tue Oct 18, 2016 12:29 pm

Being the maths nerd that I am, with an unhealthy attraction to realism, I've just gone and calculated the energies required from getting from Terra (the world with Cynosure on) to the others (and back).

First, however, some rocket science.
The energy required is something called delta-V or ΔV; the change in velocity required. Giving a spacecraft something like a 'range' is misleading, it's better to describe its engines as being able to reach a certain ΔV, given in meters per second (m/s). In space, once you start moving in one direction, you don't stop until acted on by another force, in most cases this is gravity. So the diagram below shows the ΔV you need in order to either break from the graviational pull of the object, or the ΔV you need to get rid of to slow down. If your craft cannot achieve this ΔV, then you're trapped by the gravity well of the object. Similarly, if your craft cannot get rid of the appropriate ΔV when moving into low orbit, or down to the surface, you'll burn up or crash. Those lines with little grey arrows on mean that your craft can use the atmosphere of the target to slow for that procedure, saving on fuel. The ΔV to achieve intercept includes insertion into a high orbit.

The most efficient way to move from one world to another is using a Hohmann Transfer Orbit. They're relatively slow, but unless your craft has vast amounts of fuel, a ΔV that borders on the obscene or a long time to wait, this is the only way to travel. Essentially, your craft is moving from one circular orbit to another by speeding up into a elliptical orbit and then slowing down to return to a circular orbit. The time for each transfer (if at the ΔV) is on the chart as well, given in months. As you can see, the inner system is fairly quick, but the outer planets take some time. However, the ΔV for the inner planets is much higher as you're essentially diving into towards the sun, and that energy needs bleeding off.

Later, I'll throw up some ΔV and so on for some common drive types expected to be found given Cynosure's technology levels so you can all figure out how capable your craft are.
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