Starship Asterisk*

[quote=neufer post_id=293034 time=1560700752 user_id=124483]
[quote="orin stepanek" post_id=293009 time=1560602063 user_id=100812]

Is it pure ice?[/quote]
Our Moon is the result of a glancing planetary collision with the Earth resulting in a [b][u]mostly mantle[/u][/b] moon.

If Helene was the result of a glancing collision with Dione the result would be a [b][u]mostly ice[/u][/b] moon.
[/quote]

Thanks Art!

[quote="orin stepanek" post_id=293009 time=1560602063 user_id=100812]

Is it pure ice?[/quote]
Our Moon is the result of a glancing planetary collision with the Earth resulting in a [b][u]mostly mantle[/u][/b] moon.

If Helene was the result of a glancing collision with Dione the result would be a [b][u]mostly ice[/u][/b] moon.

[quote=Boomer12k post_id=293019 time=1560631155 user_id=120851]
[quote="orin stepanek" post_id=293009 time=1560602063 user_id=100812]
Nicely done stereo; it loos like the head of some kind of animal! :D Is it pure ice?
[/quote]

I don't think it is "pure ice", but ice and rocky mix...

:---[===] *
[/quote]

Thanks Boomer! 8-)

[quote="Chris Peterson" post_id=293010 time=1560602719 user_id=117706]
[quote="orin stepanek" post_id=293009 time=1560602063 user_id=100812]
Nicely done stereo; it loos like the head of some kind of animal! :D Is it pure ice?
[/quote]

Define "ice". Define "pure".
[/quote]

Ice=frozen water in this case! Pure in this scenario; i was referring to mostly! ( I be didn't know I had to be so precise!) :roll:

[quote="orin stepanek" post_id=293009 time=1560602063 user_id=100812]
Nicely done stereo; it loos like the head of some kind of animal! :D Is it pure ice?
[/quote]

I don't think it is "pure ice", but ice and rocky mix...

:---[===] *

Really good 3D effect for me. This is one of the very few that actually APPEAR to bring out the objects from my monitor. Like about 6 inches...especially on the left side.

I wonder what the striations sweeping through some areas are... grooves from ice evaporation? There are places that look like "water pathways", and such... really puzzling to me... solar wind? Some are really long, or is it just "rough terrain"?

Really good work...

:---[===] *

[quote="orin stepanek" post_id=293009 time=1560602063 user_id=100812]
Nicely done stereo; it loos like the head of some kind of animal! :D Is it pure ice?
[/quote]

Define "ice". Define "pure".

Nicely done stereo; it loos like the head of some kind of animal! :D Is it pure ice?

I note the features that look like gullies are called "gully-like" in the explanation. Is gravity too weak on a body this small to carve erosional gullies?

P.S. That wasn't meant to be critical of the explanation's wording. Just seeking info.

Bruce

[url=https://apod.nasa.gov/apod/ap190615.html] [img]https://apod.nasa.gov/apod/calendar/S_190615.jpg[/img] [size=150]Stereo Helene[/size][/url]

[b] Explanation: [/b] Get out your [url=http://photojournal.jpl.nasa.gov/Help/VendorList.html#Glasses]red/blue glasses[/url] and float next to Helene, small, icy moon of Saturn. [url=https://solarsystem.nasa.gov/moons/saturn-moons/helene/in-depth/]Appropriately named, Helene[/url] is one of four known Trojan moons, so called because it orbits at a [url=http://math.ucr.edu/home/baez/lagrange.html]Lagrange point[/url]. A Lagrange point is a gravitationally stable position near two massive bodies, in this case [url=https://solarsystem.nasa.gov/moons/saturn-moons/overview/]Saturn and larger moon Dione[/url]. In fact, irregularly shaped ( about 36 by 32 by 30 kilometers) Helene orbits at Dione's leading Lagrange point while brotherly ice moon Polydeuces follows at Dione's trailing Lagrange point. [url=http://space-3d-images.blogspot.com/2011/06/helene-3d-cassini-cattura-la-regina-del.html]The sharp stereo anaglyph[/url] was constructed from two Cassini images captured during [url=https://solarsystem.nasa.gov/missions/cassini/overview/]a close flyby[/url] in 2011. It shows part of the Saturn-facing hemisphere of Helene mottled with craters and gully-like features.


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