Celestia Forums

Posted: **09.01.2008, 21:54**

What's the easiest way to enlarge the Sun's size? Just write an STC file? Thanks.

Posted: **09.01.2008, 22:34**

Here most people know that the size of the Celestia Sun is RIGHT! So why making it larger?

F.

Posted: **09.01.2008, 22:42**

I need to make an animation that shows the whole solar system in one frame, so I am enlarging the planets. It looks weird to have the planets larger than the sun.

Posted: **09.01.2008, 22:45**

arlduc wrote:What's the easiest way to enlarge the Sun's size? Just write an STC file? Thanks.

Arlene,
You can use an STC file to replace Sol. Or, easier, just download one of the Sun Add-Ons at the Motherlode and scale up the "Sun" planet (in the accompagnying SSC file) to your preference (those addons are in reality planets with a semimajoraxis of zero and radius larger than Sol, with sun textures on them).

- rthorvald

Posted: **10.01.2008, 03:05**

arlduc wrote:I need to make an animation that shows the whole solar system in one frame, so I am enlarging the planets. It looks weird to have the planets larger than the sun.

The sun is the first object defined in the file data/nearstars.stc. Just add a Radius property to the definition:

Code: Select all

Radius 5000000

The resulting definition should be:

Code: Select all

0 "Sol:Sun"
{
   OrbitBarycenter "Solar System Barycenter"
   CustomOrbit "vsop87-sun"

   SpectralType "G2V"
   AbsMag 4.83

   RotationPeriod      609.12  # 25.38 days
   Obliquity             7.25  # correct orientation relative to ecliptic
   EquatorAscendingNode 75.77  # 
   RotationOffset       23.00  # standard meridian
}

--Chris

Posted: **10.01.2008, 10:54**

arlduc wrote:I need to make an animation that shows the whole solar system in one frame, so I am enlarging the planets. It looks weird to have the planets larger than the sun.

Arlene, I think that my addon named "Orrery" that you can find here
http://celestiamotherlode.net/catalog/s ... don_id=902
can solve all your problems. :wink:

This is how it shows the Solar System:

Try it.
Bye

Andrea

Posted: **10.01.2008, 12:06**

looks like "dangerous traffic", i.e. hard to survive without collisions ;-)

F.

Posted: **10.01.2008, 12:29**

t00fri wrote:looks like "dangerous traffic", i.e. hard to survive without collisions F.

Yes fridger, there is some collision problem, but the students love it, so... some (safe) collision is worth the result. :wink:

Bye

Andrea

Posted: **10.01.2008, 15:16**

other option would be to use Vincent's latest
lua tools,
it has a magnification options for the planets (I believe 200 times)

Ren?©

Posted: **10.01.2008, 15:26**

rra wrote:other option would be to use Vincent's latest
lua tools,
it has a magnification options for the planets (I believe 200 times)

Ren?©

The magnification function of Vincent's Lua Tools is in fact customizable via the config.lua file. Here the respective part of the file:

Code: Select all

-------------------------------------------------------------------------------------------------------
-- Define objects to magnify when the magnification box is checked.
-- Objects to magnify can be:
--       "planets": magnify all the planets in our solar system;
--       "moons": magnify all the moons in our solar system;
--      "asteroids": magnify all the asteroids in our solar system;
--      "comets": magnify all the comets in our solar system;
--       "earth_moon": magnify the Earth and the Moon.
-------------------------------------------------------------------------------------------------------
magnified_objects = "planets"

-------------------------------------------------------------------------------------------------------
-- Define the different magnification coefficients.
-------------------------------------------------------------------------------------------------------
planets_magnification = 2000
moons_magnification = 100
asteroids_magnification = 200000
comets_magnification = 2000
earth_moon_magnification = 30

-------------------------------------------------------------------------------------------------------

Bye
Andy

Posted: **11.01.2008, 11:25**

Posted: **12.01.2008, 08:47**

It's useful. thanks.

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enlarging the Sun's size

enlarging the Sun's size

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