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Forum » SpaceEngine » Science and Astronomy Discussions » Pluto-Charon system
Pluto-Charon system
FireintheholeDate: Friday, 01.05.2015, 08:43 | Message # 31
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Quote Watsisname ()
74 days until flyby.

And only a couple of weeks left until New Horizons get a better view of Pluto than the Hubble Space Telescope!





Love SpaceEngine!
 
FaceDeerDate: Wednesday, 10.06.2015, 17:51 | Message # 32
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Though we don't yet have super awesome photos to drool over, there's still been a neat new discovery in recent days that's relevant to Space Engine beyond just Pluto itself; chaotic moon rotation. From what I've read chaotic moon rotation is due to tidal influence from other large moons tugging a small non-spherical moon in various directions over the course of its orbit

This article is one of many that came out about it, and includes a nice video showing a simulation of Nix tumbling chaotically over the course of several orbits. Previously only one chaotically rotating moon was known, Saturn's Hyperion, but now it looks like this might be a relatively common occurrence in the universe.

Space Engine will probably need to account for this procedurally at some point. I imagine a simple way to approach it might be to do a simple calculation of tidal influences to determine whether the moon should be flagged as "chaotic", and then if it is chaotic the motion can probably be faked reasonably well by just adding in a sufficiently squiggly wave function to the moon's orientation over time. That way one can still arbitrarily advance and rewind time in a consistent way and it'll look like the moon is tumbling around "unpredictably".
 
FastFourierTransformDate: Wednesday, 10.06.2015, 19:05 | Message # 33
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Quote FaceDeer ()
but now it looks like this might be a relatively common occurrence in the universe.


Your idea is great. Imagine the incredible skies of tumbling worlds smile

I have another related suggestion: Adding tumbling asteroids.
The size and age of the object are related to the non principal axis rotation of asteroids. If the asteroid is very small it could tumble for eons but if it's big then encountering one with those properties would mean it has been recently smashed by some other object. If the asteroid is old, then the tumbling stopped long ago, due to dissipation of the mechanical streses. It is very intelligently explained in two youtube videos (specially the second one):




If this exotic spin parameters could be added to Space Engine it would be spectacular!!
 
WatsisnameDate: Friday, 12.06.2015, 11:58 | Message # 34
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Latest Pluto/Charon movie. We're getting so close! Just over a month to go. smile






 
midtskogenDate: Thursday, 18.06.2015, 11:14 | Message # 35
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Nice visuals, a bit overly dramatic narration:





NIL DIFFICILE VOLENTI


Edited by midtskogen - Thursday, 18.06.2015, 11:17
 
WatsisnameDate: Saturday, 20.06.2015, 09:44 | Message # 36
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I'd rather them not make visuals like this. Let it remain mysterious until we get the real imagery. smile

Added: Speaking of real imagery, we're now getting them in color. Taken with a different instrument and resolution is lower, but things are improving pretty quickly now.





 
FastFourierTransformDate: Sunday, 21.06.2015, 23:45 | Message # 37
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The people at the Planetary Society are making better maps and images of pluto that what is publicly released by the new horizons team at their web page. They are taking the raw data (avaible in the page of the new horizons team) and stacking them together with a bit of deconvolution and some tweaks.

Here you have the best image of pluto and charon untill now


A morph between some modified images


An attempt to figure out the map of Pluto with these days data


And a map done with the average of all the data collected compared with what the new horizons have released by now


Those maps are getting closer to the ones that where generated by hubble data:

Added (21.06.2015, 23:45)
---------------------------------------------
Today a new composition has been made by Björn Jonsson.

The best pluto you can see right now!!!


Even charon has some feautures across its dark surface


Edited by FastFourierTransform - Sunday, 21.06.2015, 11:53
 
PlutonianEmpireDate: Monday, 22.06.2015, 04:29 | Message # 38
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Is that planetshine from Charon on Pluto's right side limb, or just a darker surface feature, on that second to last new image?




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midtskogenDate: Monday, 22.06.2015, 07:30 | Message # 39
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I don't think we can see Pluto/Charon shine on each other, since New Horizon still see a nearly full phase.

It will be interesting to see the surface features, but I'm not sure it's worth the effort to do this image processing knowing that better images are just days away. Unless as an exercise to have the work judged by these images. smile





NIL DIFFICILE VOLENTI
 
FastFourierTransformDate: Monday, 29.06.2015, 13:32 | Message # 40
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Quote PlutonianEmpire ()
Is that planetshine from Charon on Pluto's right side limb


I have noooo idea, but the idea is tantalizing smile

New images have been released. This one has also the color map released the last month


Added (25.06.2015, 21:43)
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Added (29.06.2015, 13:32)
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This is a simulation of what kind of images we are going to receive in the next weeks before the flyby.
A new world is going to be explored!!!



Edited by FastFourierTransform - Monday, 29.06.2015, 13:33
 
Destructor1701Date: Tuesday, 30.06.2015, 19:15 | Message # 41
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HarbingerDawnDate: Tuesday, 30.06.2015, 19:42 | Message # 42
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So close, just two weeks left!




All forum users, please read this!
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SalvoDate: Tuesday, 30.06.2015, 22:30 | Message # 43
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I remember how many different landscapes I imagined for Pluto, and now we're gonna see how it really looks... That might be disappointing, but, you know what, I don't care about it biggrin




The universe is not required to be in perfect harmony with human ambition.

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(still don't know why everyone is doing this...)
 
midtskogenDate: Wednesday, 01.07.2015, 05:16 | Message # 44
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It looks like Pluto has a huge crater on the rim there, but I suspect it's rather a landscape feature exaggerated by image processing.




NIL DIFFICILE VOLENTI
 
JohnVVDate: Thursday, 02.07.2015, 21:05 | Message # 45
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Quote

I'd rather them not make visuals like this. Let it remain mysterious until we get the real imagery.


no kidding

last week i refused to check a add on for "the OTHER " space sim i work on
it was "proclaiming" to be a REAL map of Pluto ( 5 days ago )

with close approach on the 14'th
i do not think so ( i never bothered to even look at it )

now "Bjorn Jonsson" on the UMSF site has some nice simple cylindrical remapping of the very highly deconvolved small images
post #99 Charon
http://www.unmannedspaceflight.com/index.p....=222109
Phil Stooke added some details to the Hubble data
http://www.unmannedspaceflight.com/index.p....=221831
 
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