Author Topic: Earth & Moon + Dwarf Moons (That is what I am calling them!) (Read 20728 times)

Chaotic Cow · « **on:** March 03, 2009, 08:52:37 PM »

So yeah...I thought it would be cool to see the moon have...well moons. I know they should be called satellites
but...I like the sound of "Dwarf Moon" better.

Basically it's Earth and Moon but with many named asteroids orbiting the Moon.

This took me over an hour to do. Only because I did it the old fashion way ... shot asteroids at it till they got pulled in to a constant orbit of the moon.

They all stay within the Moons Hillsphere.

Also: I have named all of them.

Pictures:

http://i455.photobucket.com/albums/qq280/MooMooUdder/UniverseSandbox-20090303-224833-140.png

http://i455.photobucket.com/albums/qq280/MooMooUdder/UniverseSandbox-20090303-224843-140.png

P.S. It's really fun to see what a mars like planet does to it when it goes by.

Naru523 · « **Reply #1 on:** March 03, 2009, 09:57:25 PM »

Cool... Dwarf Moons, Dwarf Planets, Dwarf Stars, Dwarf Galaxies..., AND MAYBE DWARF UNIVERSE!?

Chaotic Cow · « **Reply #2 on:** March 04, 2009, 07:08:51 AM »

Possibly. Smaller Universes orbiting or colliding with bigger ones!

Naru523 · « **Reply #3 on:** March 04, 2009, 06:42:35 PM »

Dwarf Asteroids also lol

Chaotic Cow · « **Reply #4 on:** March 04, 2009, 07:14:04 PM »

I'm sure that stays under the catagory "Space Debris"

Dan Dixon · « **Reply #5 on:** March 05, 2009, 01:03:18 PM »

That's cool. Thanks for sharing.

Naru523 · « **Reply #6 on:** March 13, 2009, 08:14:33 PM »

Pretty much I did copied you Cow.

Naru523 · « **Reply #7 on:** March 13, 2009, 08:36:22 PM »

Wait a sec...... shouldn't Dwarf Moons orbit a planet??

Chaotic Cow · « **Reply #8 on:** March 13, 2009, 08:38:16 PM »

No.

Noone said Moons can't have Moons.

monmarfori · « **Reply #9 on:** March 16, 2009, 07:57:39 PM »

moons are good

Chaotic Cow · « **Reply #10 on:** March 17, 2009, 10:21:26 AM »

Moons are very good.

Andreas · « **Reply #11 on:** March 22, 2009, 05:46:25 PM »

Quote from: Chaotic Cow on March 13, 2009, 08:38:16 PM

No.

Noone said Moons can't have Moons.

Moons canÂ´t have moons.

Chaotic Cow · « **Reply #12 on:** March 22, 2009, 07:27:23 PM »

Quote from: Andreas on March 22, 2009, 05:46:25 PM

Quote from: Chaotic Cow on March 13, 2009, 08:38:16 PM
No.

Noone said Moons can't have Moons.

Moons canÂ´t have moons.

You do not count.

Andreas · « **Reply #13 on:** March 23, 2009, 04:31:52 AM »

Quote from: Chaotic Cow on March 22, 2009, 07:27:23 PM

Quote from: Andreas on March 22, 2009, 05:46:25 PM
Quote from: Chaotic Cow on March 13, 2009, 08:38:16 PM
No.

Noone said Moons can't have Moons.

Moons canÂ´t have moons.
You do not count.

I know ha ha. Serious topics donÂ´t count here anymore since several weeks.

monmarfori · « **Reply #14 on:** March 23, 2009, 06:14:06 AM »

Stars have moons
earths have moons
pluto or eris have moons

Chaotic Cow · « **Reply #15 on:** March 23, 2009, 12:55:47 PM »

Quote from: monmarfori on March 23, 2009, 06:14:06 AM

Stars have moons
earths have moons
pluto or eris have moons

Moons have Moons.

Dan Dixon · « **Reply #16 on:** March 23, 2009, 01:41:46 PM »

Can moons have moons?
Yes, but they are typically unstable.

http://www.popsci.com/scitech/article/2008-04/could-moon-have-moons

FGFG · « **Reply #17 on:** March 23, 2009, 01:52:33 PM »

We find strange moons with sub-moons (as i'm calling them) because we usually don't see them, as the "Sub-moons" aren't been seen yet. However nothing say they cannot exist. (think about a miniature system Sun - Earth - Moon, orbiting another star...)

Simply we haven't find them yet because they are, teoretically, really unusual (try to visualise the hill sphere of the moon and look how small it is)

EDIT (after realizing that Dan replied already)

DHO!!!

Chaotic Cow · « **Reply #18 on:** March 23, 2009, 02:16:31 PM »

Awesome link Dan.

Not sure though if the Dwarf Moons in the system I made is unstable. They all seem good.

Then again I have yet to run the system for a very long time.

Dan Dixon · « **Reply #19 on:** March 23, 2009, 04:49:20 PM »

Quote from: Chaotic Cow on March 23, 2009, 02:16:31 PM

Not sure though if the Dwarf Moons in the system I made is unstable. They all seem good.
Then again I have yet to run the system for a very long time.

I suspect that 'unstable' could mean that the body could remain in orbit for thousands of years without any problems. In other words, it's unstable on the order of 10000-1000000 years (I'm guessing at these numbers).

And admittedly, Universe Sandbox isn't accurate enough to simulate the stability of a body over that kind of time period (as the math that Universe Sandbox uses is inaccurate by definition).

What can be said is that your 'dwarf moons' are stable in the short term, just like satellites that humans have put in orbit around our Moon.

monmarfori · « **Reply #20 on:** March 23, 2009, 05:23:02 PM »

It maybe Crashed and merge in planet

Chaotic Cow · « **Reply #21 on:** March 24, 2009, 12:44:51 PM »

Quote from: Dan Dixon on March 23, 2009, 04:49:20 PM

Quote from: Chaotic Cow on March 23, 2009, 02:16:31 PM
Not sure though if the Dwarf Moons in the system I made is unstable. They all seem good.
Then again I have yet to run the system for a very long time.

I suspect that 'unstable' could mean that the body could remain in orbit for thousands of years without any problems. In other words, it's unstable on the order of 10000-1000000 years (I'm guessing at these numbers).

And admittedly, Universe Sandbox isn't accurate enough to simulate the stability of a body over that kind of time period (as the math that Universe Sandbox uses is inaccurate by definition).

What can be said is that your 'dwarf moons' are stable in the short term, just like satellites that humans have put in orbit around our Moon.

I wonder if it's possible to make it unstable. Via editting something in US (Not XML since I have no clue how to do XML) which will slowly but surely cause some form of unstable-ness.

If you have an Idea on how I could do that..do explain.

Dan Dixon · « **Reply #22 on:** March 24, 2009, 12:54:28 PM »

If the orbits of the 'dwarf moons' were a bit larger they would be more directly influenced by Earth's gravity making them more unstable.

In an upcoming version of Universe Sandbox you'll be able to directly edit the orbital elements values which would let you easily change the semi-major axis.

Currently... you can give each body a little more velocity which will cause the orbit to expand. Right click and just bump up the 'dwarf moons' velocity a little.

Chaotic Cow · « **Reply #23 on:** March 24, 2009, 01:31:28 PM »

Upcoming doesn't exactly mean next version. But if it does. Can't wait. =]

monmarfori · « **Reply #24 on:** March 25, 2009, 03:15:53 AM »

If Planets Stars Moons have Moons. what happens

Chaotic Cow · « **Reply #25 on:** March 25, 2009, 08:12:58 AM »

Quote from: monmarfori on March 25, 2009, 03:15:53 AM

If Planets Stars Moons have Moons. what happens

I'm confused on what you are asking.

monmarfori · « **Reply #26 on:** March 25, 2009, 03:51:20 PM »

its
a star with planets and moons

FGFG · « **Reply #27 on:** March 26, 2009, 02:14:47 PM »

can you reformulate the question? I'm still confused too...

Andreas · « **Reply #28 on:** March 26, 2009, 06:00:28 PM »

no...please donÂ´t reformulate it...just let it go...w

monmarfori · « **Reply #29 on:** March 26, 2009, 06:19:38 PM »

it must be guessed when our earth, like moon
sun, like planets
and planets, like moons