4. shift up/down 可改變M42 3D view
其他 深空天體也有 3D model
好像還有 Star Trek ..
再來把ISON 加入 ..找這套是想OFF LINE 可以 SHOW 彗星軌道
來到這邊
http://astroblogger.blogspot.tw/2013/09/comet-c2012-s1-ison-in-celestia.htmlbelow and save as it as a text file 2012S1.ssc in the Celestia extras folder.
======================2012S1.ssc=============================
"C2012S1:ISON" "Sol"
{
Class "comet" # Just copying the data for Halley
Mesh "halley.cmod"
Texture "asteroid.jpg"
Radius 5 # best guess at maximum semi-axis
MeshCenter [ -0.338 1.303 0.230 ]
# Data from latest JPL Horizons orbit as of 15 Sep 2013
# Comet has a hyperbolic orbit, so Celestia will not show an orbit track
#
EllipticalOrbit
{
Epoch 2456625.280420214468 # 2013-Nov-28.78042021 TT
Period 165849.9873 # (q/(e-1))^1.5 hyperbolic orbit
SemiMajorAxis -3018.632859 #Hyperbolic orbit
PericenterDistance 0.01249597828341519
Eccentricity 1.000004139615141
Inclination 61.91714591634256
AscendingNode 295.7273670259968
ArgOfPericenter 345.5153902820819
MeanAnomaly 0.0
}
# Again, this data is copied straight from the ssc files for Halleys’ Comet
# chaotic rotation, imperfectly defined:
# this version from "The New Solar System", 4th Edition; Eds.
# JK Beatty, CC Petersen, A Chaikin
PrecessingRotation
{
Period 170 # 7.1 day axial rotation period
Inclination 66
PrecessionPeriod 3457004.12 # 3.7 day precession period
}
Albedo 0.8
}
=> save 成 2012s1.ssc 我是放到 extra folder2012s1 下
觀星工具 
