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Eta Carinae Homunculus Nebula scaled one in 1.2*10^17

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  • etacarinae_1_121_10_15.stl
  • etacarinae_1_203_10_14.stl
  • etacarinae_1_406_10_14.stl
  • etacarinae_north_1_121_10_15.stl
  • etacarinae_north_1_203_10_14.stl
  • etacarinae_north_1_406_10_14.stl
  • etacarinae_north_h1_1_121_10_15.stl
  • etacarinae_north_h1_1_203_10_14.stl
  • etacarinae_north_h1_1_406_10_14.stl
  • etacarinae_north_h2_1_121_10_15.stl
  • etacarinae_north_h2_1_203_10_14.stl
  • etacarinae_north_h2_1_406_10_14.stl
  • etacarinae_south_1_121_10_15.stl
  • etacarinae_south_1_203_10_14.stl
  • etacarinae_south_1_406_10_14.stl
  • etacarinae_south_h1_1_121_10_15.stl
  • etacarinae_south_h1_1_203_10_14.stl
  • etacarinae_south_h1_1_406_10_14.stl
  • etacarinae_south_h2_1_121_10_15.stl
  • etacarinae_south_h2_1_203_10_14.stl
  • etacarinae_south_h2_1_406_10_14.stl

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Publication date 2023-02-06 at 17:40
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Published to Thingiverse on: 2023-01-31 at 13:26
Design number 1049911
tato_713

tato_713

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3D model description

This model is just a smooth version of the model from the NASA team (see References). I made it in the same scale as that model (1:1.2168x1017, about 8cm long) so you can use the same display stand (https://svs.gsfc.nasa.gov/vis/a010000/a011500/a011568/model_stand_80mm.pdf); and in another two scales, three and six times bigger (1:4.056x1016 and 1:2.028x1016). I add nothing but a reshape of the original model, it's not more accurate, just a bit nicer when printed. I also divided the model in 2 and 4 parts: the lobes are tagged as "north" and "south", which are the NW and SE lobes, based on their orientation in the sky. The real north and sough would be derived from the direction of the orbit of the two stars that composes Eta Carinae, which is unknown. Each lobe is also split in two parts: "h1" are the "north" and "h2" are the south parts for each lobe.

Eta Carinae
This is a double star system, which main component is a giant star 100 times as massive as the Sun and 240 times as big, what makes this star one of the largest. The other component is also several times as massive as the Sun, between 30 and 80 times. This star system was not so visible until the middle of the 19th century, when the star "exploded" in an event dubbed as the "Great Eruption", becoming the second brightest star in the star, later fading again. The material from this explosion expanded in the direction of the poles of the system, forming two lobes of gas that brights reflecting the light of the stars. This is called the Homunculus Nebula. It's been expanding since the Great Eruption, now it is about one light year long; and since its axis is low inclined with respect the line of sight from Earth, this means that what we see from the far lobe (the NW one) is up to one year older than the near lobe.

Type: Binary star surrounded by a reflection nebula.
Distance to the Sun: 7500 ly.
Orbital period: 5h 36 min
Dimensions: ~1 ly long, ~0.46 ly wide
Model scale: 1:2.028x1016 (44cm high) 1:4.056x1016 (22cm) 1:1.2168x1017 (8cm)

References

Eta Carinae Homunculus Nebula. NASA 3D resources.
Homunculus Nebula - 3D model display stand

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Scale [1:x]
K = 103 (thousand)M = 106 (million)G = 109 (billion)


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