
http://physicsworld.com/cws/article/news/2016/aug ... -around-suns-nearest-neighbour
Nice little video on YouTube :
https://www.youtube.com/watch?v=pJWZ7ikJR2k
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"b" "Proxima"
{
Texture "asteroid.jpg"
Mass ?? # M.sin(i) = ?? earths
Radius ??
EllipticalOrbit {
Period ??
SemiMajorAxis ??
MeanLongitude ??
Inclination ??
}
UniformRotation {
Period ?? # hours
Inclination ??
AscendingNode ??
MeridianAngle ??
}
}
Cham wrote:We already need to make an addon for this ! This is too great to miss in Celestia !
OK Cham. Here is my version of the add-on as a super Mars.Cham wrote:I'm pasting a template here. Currently, I don't have time to make it all yet.
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"Uncifomied b:b" "V 645 Cen"
{
Texture "MarsType.*"
NormalMap "MarsTypeNormal.*"
Radius 7821#=1.23 RE.Super Mars type
Mass 2.00
#AbsMag 38.36#Mayde
InfoURL "https://palereddot.org/"
BodyFrame { EclipticJ2000 {} }
EllipticalOrbit {
Period 0.03469 #=12.671 d
SemiMajorAxis 0.06#8976000 km
Eccentricity 0.0
#OV 51.5
}
Atmosphere
{
Height 400
Lower [ 0.8 0.6 0.6 ]
Upper [ 0.7 0.3 0.3 ]
Sky [ 0.83 0.75 0.65 ]
Sunset [ 0.7 0.7 0.8 ]
CloudHeight 50
CloudSpeed 156
CloudMap "15h-clouds.*"
Mie 0.0001
MieAsymmetry -0.1
Rayleigh [ 0.007 0.007 0.008]
MieScaleHeight 20
}
RotationPeriod 14.00
}
It is this and really would like to, but alas, most likely in reality it is a lifeless desert. I still doubt the life of the chromospheric activity of red dwarfs. It's like living next to a nuclear bombomega13a wrote:At best I think it would probably be home to extrememophiles.
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"Proxima b:b" "Proxima"
{
Texture "asteroid.*" # light from proxima makes a good "cooked on one side" effect
Radius 7008.1 # at least 1.1 earth radii
EllipticalOrbit
{
Period 0.03062560 # 11.186 days
SemiMajorAxis 0.05 # AU
Eccentricity 0 # <.35
Inclination 0 # unknown, most likely doesn't cross star
}
BodyFrame # most likely tidally locked
{
TwoVector
{
Center "Proxima/b"
Primary
{
Axis "x"
RelativePosition { Target "Proxima" }
}
Secondary
{
Axis "y"
RelativeVelocity { Target "Proxima" }
}
}
}
}
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"B" "Proxima Cen"
{
Class "planet"
Texture "4k.basergb4.png"
NormalMap "4kNorm.png"
SpecularTexture "4k.basespec.png"
SpecularColor [ 0.25 0.2 0.2 ]
SpecularPower 12.0
#Mass 2
Radius 6800
Oblateness 0.01
Atmosphere {
Height 60
Lower [ 0.65 0.55 0.5 ]
Upper [ 0.7 0.5 0.5 ]
Sky [ 0.8 0.4 0.6 ]
Sunset [ 1.0 0.5 0.25 ]
CloudHeight 30
CloudSpeed 930
CloudMap "Cloud1234.png"
Mie 0.001
MieAsymmetry -0.25
Rayleigh [ 0.004 0.0025 0.002 ]
MieScaleHeight 12
}
EllipticalOrbit {
Eccentricity 0.35
AscendingNode 1
SemiMajorAxis 0.0485
ArgOfPericenter 1
MeanAnomaly 1
Inclination 40
Period 0.0306
}
UniformRotation
{
Period 177 #hours
Inclination 38
AscendingNode 15.0
MeridianAngle 0.0
}
}
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"b" "Proxima"
{
Texture "venuslike.jpg"
Mass 1.3 # M.sin(i) = ?? earths
Radius 7143.51344
EllipticalOrbit {
Period 0.03063604704645508903
SemiMajorAxis 0.0485
Eccentricity 0.35
MeanLongitude 310
Inclination 0
}
UniformRotation {
Period 179.04 # Given its eccentric orbit, it probably has a spin/orbit resonance like Mercury
Inclination 0
AscendingNode 0
MeridianAngle 310
}
}
This isn't exact at all. It is just the illusion of precision. Scientifically, this is pure non-sense ! You should learn the proper significant digits to get something valuable:omega13a wrote:What can I say? I like things to be exact.
I've lost track of how many add-ons have that problem (including many of my early ones) but its only noticeable for objects that have a long orbital period.selden wrote:When displaying many objects (for example, stars in a cluster) if you provide only the minimum valid precision, then they'll seem to align with one another in sheets or on a grid, which is itself very non-physical. The additional digits can be used to provide a random displacement for each of the objects so those alignments don't happen.
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