Celestia Forums

Happy new year everyone.I very much enjoy the new rendering of galaxies in the latest version of Celestia,and have been trying to update the deep sky addons I have made to go with version 1.4.0.However,when I look at M33 from Earth,and compare it to photos,it seems that the spiral arms of M33 are reversed in Celestia.Is there any easy way to correct this in the deepsky.dsc file-or am I missing something here?
Here's a screenshot




and here's a photo

http://antwrp.gsfc.nasa.gov/apod/ap021202.html

Cheers,Jestr

Jestr,

yes I know. That's the price for mass rendering in terms of a few templates only. There are more such cases, although I have tried to minimize them at least for the well known objects.

Unfortunately, there is generically no flag in galaxy catalogs indicating the rotation sense of the spiral arms. Unfortunately to work at 10600+ by hand is simply a bit too much...

Perhaps one of us has a good idea in these days...

Bye Fridger

Hi Fridger,is there an easy way to reverse the arms,in the deepsky.dsc?Perhaps by changing the axis definition?Or the Angle?Jestr

jestr wrote:Hi Fridger,is there an easy way to reverse the arms,in the deepsky.dsc?Perhaps by changing the axis definition?Or the Angle?Jestr

The flip is easy for me in terms of quaternions, but not so easy for hand editors without PERL...

Bye Fridger