APOD: Mimas in Saturnlight (2017 Mar 16)

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APOD: Mimas in Saturnlight (2017 Mar 16)

Postby APOD Robot » Thu Mar 16, 2017 4:08 am

Image Mimas in Saturnlight

Explanation: Peering from the shadows, the Saturn-facing hemisphere of Mimas lies in near darkness alongside a dramatic sunlit crescent. The mosaic was captured near the Cassini spacecraft's final close approach on January 30, 2017. Cassini's camera was pointed in a nearly sunward direction only 45,000 kilometers from Mimas. The result is one of the highest resolution views of the icy, crater-pocked, 400 kilometer diameter moon. An enhanced version better reveals the Saturn-facing hemisphere of the synchronously rotating moon lit by sunlight reflected from Saturn itself. To see it, slide your cursor over the image (or follow this link). Other Cassini images of Mimas include the small moon's large and ominous Herschel Crater.

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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby Boomer12k » Thu Mar 16, 2017 4:39 am

Interesting...

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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby DL Martin » Thu Mar 16, 2017 10:21 am

Nothing says "Cancel the human component of space exploration better than Cassini." Robots do it better at incalculable less cost and effectiveness.

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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby starsurfer » Thu Mar 16, 2017 11:39 am

For some reason this image makes me think of the Wolf Rayet nebula around WR 16? :shock:
wr16.jpg

mimas.jpg

Click to view full size image 1 or image 2
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby heehaw » Thu Mar 16, 2017 3:01 pm

Magnificent!

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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby De58te » Thu Mar 16, 2017 4:04 pm

Anybody else see the Easter Bunny on Mimas? About one quarter the way up from the bottom on the terminator line, the Easter Bunny is riding a broomstick. It's rear leg is in bright white light from its lap to the bent knee to the toes. Its front leg is shorter, maybe deformed, with slightly less bright light. Its back is dark with its tail missing. The head looking up to the right has a bright white nose with a smaller white eye. The ears are distinctive rabbit ears on its head with a bright white tip. Once you see the Easter Bunny you can't unsee.

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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby Fred the Cat » Thu Mar 16, 2017 4:36 pm

Schnell Mimas has a dimple design that would move more quickly through an Aether that's not there - just like today's mouseover. :ssmile:
Feynman's Felicity "Only ascertain as a cat box survivor"

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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby neufer » Thu Mar 16, 2017 5:24 pm

Fred the Cat wrote:
Schnell Mimas has a dimple design that would move more quickly through an Aether that's not there - just like today's mouseover. :ssmile:

    It's not necessarily an Aether ore situation.
    (as it depends upon Aether viscosity).

https://en.wikipedia.org/wiki/Golf_ball wrote:

<<William Taylor registered a patent for a dimple design in 1905. Most golf balls on sale today have about 250–450 dimples, though there have been balls with more than 1000 dimples. The record holder was a ball with 1,070 dimples—414 larger ones (in four different sizes) and 656 pinhead-sized ones.
. :arrow: .
Drag coefficient Cd for a sphere as a function of Reynolds number Re, as obtained from laboratory experiments. The dark line is for a sphere with a smooth surface, while the lighter line is for the case of a rough surface (e.g. with small dimples). There is a range of [low] fluid velocities where a rough-surfaced golf ball experiences less drag (in a viscous fluid) than a smooth ball.>>
https://en.wikipedia.org/wiki/Reynolds_number wrote:
The Reynolds number is defined as:

where:
    ρ is the density of the fluid (SI units: kg/m3)
    u is the velocity of the fluid with respect to the object (m/s)
    L is a characteristic linear dimension (m)
    μ is the dynamic viscosity of the fluid (Pa·s or N·s/m2 or kg/(m·s))
    ν is the kinematic viscosity of the fluid (m2/s).
Last edited by neufer on Thu Mar 16, 2017 5:42 pm, edited 1 time in total.
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby Fred the Cat » Thu Mar 16, 2017 5:40 pm

neufer wrote:
Fred the Cat wrote:
Schnell Mimas has a dimple design that would move more quickly through an Aether that's not there - just like today's mouseover. :ssmile:

    It's not necessarily an Aether ore situation:

https://en.wikipedia.org/wiki/Golf_ball wrote:

<<William Taylor registered a patent for a dimple design in 1905. Most golf balls on sale today have about 250–450 dimples, though there have been balls with more than 1000 dimples. The record holder was a ball with 1,070 dimples—414 larger ones (in four different sizes) and 656 pinhead-sized ones.
. :arrow: .

Drag coefficient Cd for a sphere as a function of Reynolds number Re, as obtained from laboratory experiments. The dark line is for a sphere with a smooth surface, while the lighter line is for the case of a rough surface (e.g. with small dimples). There is a range of fluid velocities where a rough-surfaced golf ball experiences less drag than a smooth ball.>>


That black hole wouldn't be a huge collection of bosons would it? Maybe that Schnell was hit by a ferm iron… :wink:
Feynman's Felicity "Only ascertain as a cat box survivor"

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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby neufer » Thu Mar 16, 2017 5:59 pm

Fred the Cat wrote:
That black hole wouldn't be a huge collection of bosons would it? Maybe that Schnell was hit by a ferm iron… :wink:

    Saturn uses a sand iron :arrow:
https://en.wikipedia.org/wiki/Sand_wedge wrote:
<<A sand wedge, or sand iron, is a type of golf club, an open-faced wedge primarily designed for use out of sand bunkers. It has the widest sole of any wedge, which provides the greatest amount of bounce, allowing the club head to glide through sand and avoid digging in. The modern sand wedge is often the heaviest iron in a player's bag, with most weighing nearly 40 ounces. Traditionally it also had the highest loft at 56 degrees, although that distinction now goes to the lob wedge, which often has a loft of 60 degrees or more.>>
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby Fred the Cat » Thu Mar 16, 2017 6:26 pm

neufer wrote:
Fred the Cat wrote:
That black hole wouldn't be a huge collection of bosons would it? Maybe that Schnell was hit by a ferm iron… :wink:

    Saturn uses a sand iron :arrow:
https://en.wikipedia.org/wiki/Sand_wedge wrote:
<<A sand wedge, or sand iron, is a type of golf club, an open-faced wedge primarily designed for use out of sand bunkers. It has the widest sole of any wedge, which provides the greatest amount of bounce, allowing the club head to glide through sand and avoid digging in. The modern sand wedge is often the heaviest iron in a player's bag, with most weighing nearly 40 ounces. Traditionally it also had the highest loft at 56 degrees, although that distinction now goes to the lob wedge, which often has a loft of 60 degrees or more.>>



Love the symmetry in those thoughts.

Saturn.jpg


A celestial hole-in-one. :thumb_up:
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby pferkul » Thu Mar 16, 2017 6:54 pm

Interesting effect. Similar to how I brightened the shadows of your Enceladus image on Feb 9, 2017.

http://asterisk.apod.com/viewtopic.php?f=9&t=36829&p=266970#p266970
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby MarkBour » Thu Mar 16, 2017 8:19 pm

Mimas does have the quintessential war-torn landscape.
http://www.greekmythology.com/Myths/Gigantes/Mimas/mimas.html
He participated in the Gigantomachy, the battle that occured between the Gigantes and the Olympians, and he was the main opposition of the god Hephaestus; he was killed by him with missiles of red hot metal. Another account says that he was killed by Zeus, hurling a thunderbolt against him and turning him to ash.
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby neufer » Thu Mar 16, 2017 9:43 pm

MarkBour wrote:
Mimas does have the quintessential war-torn landscape.
http://www.greekmythology.com/Myths/Gigantes/Mimas/mimas.html
He participated in the Gigantomachy, the battle that occured between the Gigantes and the Olympians, and he was the main opposition of the god Hephaestus; he was killed by him with missiles of red hot metal. Another account says that he was killed by Zeus, hurling a thunderbolt against him and turning him to ash.
https://en.wikipedia.org/wiki/Giants_(Greek_mythology)#The_Gigantomachy wrote:
Click to play embedded YouTube video.

<<The most detailed account of the Gigantomachy is that of the mythographer Apollodorus, who suggests a mother's revenge as the motive for the war, saying that Gaia bore the Giants because of her anger over the Titans (who had been vanquished and imprisoned by the Olympians). And seemingly, as soon as the Giants are born they begin hurling "rocks and burning oaks at the sky".

Gaia sought for a certain plant (pharmakon) that would protect the Giants. But before Gaia or anyone else could find this plant, Zeus forbade Eos (Dawn), Selene (Moon) and Helios (Sun) to shine, and harvested all of the plant himself.>>
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby MarkBour » Sat Mar 18, 2017 1:22 am

neufer wrote:
https://en.wikipedia.org/wiki/Giants_(Greek_mythology)#The_Gigantomachy wrote:<<The most detailed account of the Gigantomachy is that of the mythographer Apollodorus, who suggests a mother's revenge as the motive for the war, saying that Gaia bore the Giants because of her anger over the Titans (who had been vanquished and imprisoned by the Olympians). And seemingly, as soon as the Giants are born they begin hurling "rocks and burning oaks at the sky".

Gaia sought for a certain plant (pharmakon) that would protect the Giants. But before Gaia or anyone else could find this plant, Zeus forbade Eos (Dawn), Selene (Moon) and Helios (Sun) to shine, and harvested all of the plant himself.>>

That sounds like a late heavy bombardment to me.
There is an album with that title, by the group Mexican Ape-Lord. Not quite as easy-listening as Peter, Paul, and Mary. The guitar riffs are indeed reminiscent of hurling burning oaks at the sky, but I can't post a YouTube sample, because the lyrics are not appropriate to this forum.
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Re: APOD: Mimas in Saturnlight (2017 Mar 16)

Postby neufer » Sun Mar 19, 2017 12:51 pm

Click to play embedded YouTube video.
MarkBour wrote:
neufer wrote:
https://en.wikipedia.org/wiki/Giants_(Greek_mythology)#The_Gigantomachy wrote:
<<The most detailed account of the Gigantomachy suggests a mother's revenge as the motive for the war, saying that Gaia bore the Giants because of her anger over the Titans (who had been vanquished & imprisoned by the Olympians). And seemingly, as soon as the Giants are born they begin hurling "rocks & burning oaks at the sky".>>

    That sounds like a late heavy bombardment to me.
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