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Why Does My Simulation Of Jupiter Not Orbit Around The Sun As Expected?

I am viewing the sun and 4 outer solar system planets  at 31AU above the sun's north pole.
I have the drawn orbits for the 4 outer planets. I moved the system forward 26 days
and Jupiter made a complete orbit around the sun. That can't be!!!!

15 comments

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    Dave Whipps

    John,

    I'm not able to reproduce this. That is, Jupiter seems to be orbiting just fine for me. Is this reproducible for you? Can you send a video of this occurring, and/or save a file of the setup? (Settings > Save and Open > Save/Download).

    Thanks,

    Dave

     

     

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    John Pendleton

    Hello Dave.

    I looked through all of my menus and did not find the option "Settings".

    So I cannot save or download that.

    I started from "scratch" my viewing location being the "sun" on its surface

    at 90°N.

    I then went 31AU above the sun and added in the 4 inner planets and Jupiter

    with their drawn orbits.

    I clicked on the date "day" advancing from the present, and I

    got Jupiter to make a complete orbit of the sun in 26 earth days.

     

    How about we do it the other way? You send me your settings and/or

    a video of how Jupiter moves "correctly"?

    Thanks

    John

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    John Pendleton

    Also, why do the planets rotate counter-clockwise when I

    click the days in reverse? i.e. March 10 to March 9 to March 8, etc.???

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    John Pendleton

    I selected a "print screen" and pasted in Paint.

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    Dave Whipps

    John,

    A few things here:

    1) This forum is to discuss LiveSky.com, which is a different application than Starry Night. (No problem, just for future reference, you'll want to use the Starry Night forum.)

    2) I'm still not able to reproduce that behaviour. I'd need to see it happening in a video or for you to send me a saved file (File > Save...) so that I can deduce what might be happening.

    3) It's possible for the planets to appear to be rotating the other direction depending if you, as the viewer are "above" or "below" the plane of the solar system.

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    John Pendleton

    I clicked on Starry NIght Pro 8 and ended up here anyway.

    Dave wrote:3) It's possible for the planets to appear to be rotating the other direction depending if you, as the viewer are "above" or "below" the plane of the solar system.

    I designed my view from the surface of the sun 90°N and then went 5.6AU up. I am viewing from above.

    WHen I click a reverse date the planets rotate counter-clockwise when they should rotate.

    Clockwise. --- I tried saving to SkyView as a photo and then as a video. I moved the date backwards

    from March 11th today. Jupiter and 4 inner planets all move counter clockwise. Hope you can help me.

     

  • 0
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    Dave Whipps

    John,

    Sorry about telling you to use "Settings." That's how you do it in LiveSky.com (i was confused, because this is the LiveSky Forum.)

    Just setup the view as you have in the screenshot and do a File > Save As...

    Also, what language is your system set to? The month says "enero".

    - Dave

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    John Pendleton

    Hello Dave.

    I saved a couple of examples of mine under "JOHN PENDLETON" to SkyView or

    sorry I don't remember.

    Actually, what would probably solve everything for me would be to have the same

    program you have. What program do you have and how much did it cost you?

    Thanks for helping.

    John

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    John Pendleton

    BTW, I live in Mexico so for some reason the system gets into Spanish

    Enero= January.

    LOL

  • 0
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    Dave Whipps

    John,

    I have Starry Night too, and it's great. You're speaking with one of the developers! I'm not sure what you mean by saving the examples to SkyView. I'd really like to help you, and I assure you that the planets in Starry Night move the correct direction. Can you perhaps just use the location tool to "drag" yourself around the Sun to the other side so that the planets rotate around the direction you'd like to see?

    - Dave

     

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    John Pendleton

    Hello Dave.

    I am confused. I would think that the correct place to view the solar system would

    be from above the north pole of the sun. // So I took your suggestion and made my

    Viewing Location to be from the sun's surface 90°S. Then I zoomed out about 5AU, I selected

    the 4 inner planets plus Jupiter.  When I advance the date from today's date of March 18th, all

    the planets rotate in a counter clockwise orbits around the sun.

    HOWEVER, Jupiter makes a complete orbit of the sun in 25-26 earth days. !!! //You say your Starry Night

    rotates the planets counter clockwise. Fine. When you click on advancing the date from today's date, how

    many earth days does it take Jupiter to go around the sun once?/// Sorry. My mistake. The dropdown menu

    for File, I chose "Export to Sky View" video. I do  not know how to recover what I did.

  • 0
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    Keiron Smith

    Hi John, 

    Setup up your simulation.  Then go to File -> Save As -> SNF (Starry Night File).

    Send the file to me here: ksmith at simcur.com

    I'll have a look at what you're doing and we can discuss more.

    Thanks!

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    John Pendleton

    Hello Dave and Keiron.

    No word from either of you. What am I to do?

    John Pendleton

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    Keiron Smith

    Hi John, 

    If you look at your simulation you will notice that the stars in the background are also turning with the planets as you advance day by day.  

    As the stars in the background are turning counter-clockwise in your simulation along with the planets, along with Jupiter, the end result is that the planets are not actually moving as much as they appear to be.  Relative to the stars, in your simulation, the planets are not moving that much as you advance each day.  

    If the stars in the background stayed in the same position then there would be a problem with the program.  But, in this case, there is something about the way you have set up the simulation, and I can't quite figure out what it is.

    Please create a short video that shows how you create this simulation from the very beginning.  Send it to my email address.

    For an accurate simulation of the planets orbiting, including Jupiter, around the Sun, with the stars staying still in the background, please see the favourite file:

    Favourites > Solar System > Outer Planets > Outer Solar System

    Thanks!

  • 0
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    Keiron Smith

    I figure out what the problem is.  When you select to go to the surface of the Sun, 90°N, you are on the surface, and as such turn as the Sun turns.  This does not change as you ascend straight up into space.  Your position in space is pivoting with the turning of the Sun.  What you are looking for is a Fixed Position in space.  To do this add another step, # 3.5, and choose Options > Viewing Location > View From: Stationary Location (do not change anything) > View From Selected Location.  Now continue with #4, etc, observe the orbit of the planets as you advance day by day.

    Starry Night is fine.  Problem is solved.

    Thanks, John, for your patience.

    This thread is now locked as it is duplicated.

    [UX Issue] Why Does My Simulation Of Jupiter Not Orbit Around The Sun As Expected? (Answer: Choose A Fixed Position In Space)

    Thanks!

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