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Astronomy Picture of the Day -- Lunation
NASA ^ | February 05, 2012 | (see photo credit)

Posted on 02/05/2012 8:57:07 AM PST by SunkenCiv

Explanation: Our Moon's appearance changes nightly. This time-lapse sequence shows what our Moon looks like during a lunation, a complete lunar cycle. As the Moon orbits the Earth, the half illuminated by the Sun first becomes increasingly visible, then decreasingly visible. The Moon always keeps the same face toward the Earth. The Moon's apparent size changes slightly, though, and a slight wobble called a libration is discernible as it progresses along its elliptical orbit. During the cycle, sunlight reflects from the Moon at different angles, and so illuminates different features differently. A full lunation takes about 29.5 days, just under a month (moon-th).

February 05, 2012

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; moon; science
[Credit & Copyright: António Cidadão]

1 posted on 02/05/2012 8:57:12 AM PST by SunkenCiv
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To: SunkenCiv

IBTP?


2 posted on 02/05/2012 8:58:36 AM PST by DeoVindiceSicSemperTyrannis
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To: SunkenCiv

IBTP again?


3 posted on 02/05/2012 8:59:15 AM PST by DeoVindiceSicSemperTyrannis
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To: DeoVindiceSicSemperTyrannis

Wonder how many times I can get IBTP?


4 posted on 02/05/2012 9:00:37 AM PST by DeoVindiceSicSemperTyrannis
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To: DeoVindiceSicSemperTyrannis
IBTP

IBTP

IBTP

IBTP

IBTP

IBTP

IBTP

IBTP

IBTP

IBTP

5 posted on 02/05/2012 9:01:28 AM PST by DeoVindiceSicSemperTyrannis
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To: Lonesome in Massachussets; brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; ...

Click the pic to visit an FR post by Lonesome in Massachussets. LiM posted the version seen here (the APoD site uses a different version), mentions the photographer and discusses libations (the lunar kind).
APOD in India: APOD editor to speak in Delhi on Feb. 12 (registration required)
50 posted on 03/18/2006 5:27:42 PM PST by Lonesome in Massachussets

6 posted on 02/05/2012 9:03:13 AM PST by SunkenCiv (FReep this FReepathon!)
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To: SunkenCiv

Dagnabbit! Mooned again!


7 posted on 02/05/2012 9:06:13 AM PST by Smokin' Joe (How often God must weep at humans' folly. Stand fast. God knows what He is doing)
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To: SunkenCiv

Wobbly, unpredictable behavior is what you’d expect from a Loon nation...


8 posted on 02/05/2012 9:07:28 AM PST by mikrofon (Inconstant Moonbats)
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To: SunkenCiv

Whoa duuuuuude.


9 posted on 02/05/2012 9:12:21 AM PST by cripplecreek (What does it profit a man if he gains the whole world but loses his soul?)
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To: DeoVindiceSicSemperTyrannis; SunkenCiv

Take that Deo...

10 posted on 02/05/2012 9:13:34 AM PST by bigheadfred (Bang a gong)
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To: SunkenCiv

Gazing at that for any length of time will drive you Loony!


11 posted on 02/05/2012 9:14:39 AM PST by left that other site
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To: bigheadfred

12 posted on 02/05/2012 9:21:39 AM PST by bigheadfred (Bang a gong)
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To: DeoVindiceSicSemperTyrannis

I had a short-lived problem finding LiM’s stuff to use. :’) IATP.


13 posted on 02/05/2012 9:24:41 AM PST by SunkenCiv (FReep this FReepathon!)
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To: bigheadfred

You work fast.

Either one would make an excellent background= image.


14 posted on 02/05/2012 9:28:14 AM PST by SunkenCiv (FReep this FReepathon!)
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To: bigheadfred

I feel like I should be stuffing a dollar into someone’s g string after looking at that.


15 posted on 02/05/2012 9:31:09 AM PST by cripplecreek (What does it profit a man if he gains the whole world but loses his soul?)
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To: SunkenCiv; DeoVindiceSicSemperTyrannis
Either one would make an excellent background= image.

LOL. To all the people who never go outside at night and look--UP!

16 posted on 02/05/2012 9:34:51 AM PST by bigheadfred (Bang a gong)
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To: cripplecreek

Gotta get yer sea-legs if you wanna stare at that one.


17 posted on 02/05/2012 9:38:51 AM PST by SunkenCiv (FReep this FReepathon!)
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To: left that other site
Gazing at that for any length of time will drive you Loony!

That would make it *ill-lunation* I guess :^)

18 posted on 02/05/2012 9:39:56 AM PST by The Cajun (Palin, Free Republic, Mark Levin, Newt......Nuff said.)
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To: left that other site

I don’t have that far to go.


19 posted on 02/05/2012 9:48:04 AM PST by SunkenCiv (FReep this FReepathon!)
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To: SunkenCiv; The Cajun

You of course KNOW why moon deities were almost always female, don’t you?

28 day cycle,Full Moon Lunacy(PMS),Veiled and Mysterious...

I can posit this loony theory, being female, and having been there, done that! LOL!


20 posted on 02/05/2012 10:09:19 AM PST by left that other site
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To: SunkenCiv; The Cajun

You of course KNOW why mythical moon deities were almost always female, don’t you?

28 day cycle,Full Moon Lunacy(PMS),Veiled and Mysterious...

I can posit this loony theory, being female, and having been there, done that! LOL!


21 posted on 02/05/2012 10:10:08 AM PST by left that other site
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To: SunkenCiv
The Scientific Visualization Studio (SVS) at NASA Goddard has prepared a virtual movie, based on LRO laser altimetry (LOLA instrument), recently, showing the same 59 percent libration.

It's animations, also, can be downloaded or viewed directly; Moon Phase and Libration can be calculated, here. (Scroll Down for animations, stills, etc.)

- Lunar Pioneer

22 posted on 02/05/2012 10:13:43 AM PST by Prospero
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To: left that other site
The wise old Cajun will not offer a comment on that :^)
23 posted on 02/05/2012 10:35:40 AM PST by The Cajun (Palin, Free Republic, Mark Levin, Newt......Nuff said.)
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To: SunkenCiv
Also shows libration, the wobble that means we can map more than 50% of the lunar surface with ground observation alone.
24 posted on 02/05/2012 10:52:40 AM PST by ExGeeEye (Islam: a transnational fascist government that demands worship.)
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To: The Cajun

LOL! We MiQ’Maw and Cajun have the same roots, you know.


25 posted on 02/05/2012 11:00:19 AM PST by left that other site
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To: The Cajun

“The wise old Cajun will not offer comment...”

Ahhh, the bait was dangled but you chose not to take it?! LOL!


26 posted on 02/05/2012 11:14:17 AM PST by momtothree
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To: left that other site
We MiQ’Maw and Cajun have the same roots, you know.

Bet most MiQ’Maw try to keep that a secret, LOL.
If asked they would probably say "Naw, naw, we ain't related to them crazy Cajuns" :^)

27 posted on 02/05/2012 11:27:27 AM PST by The Cajun (Palin, Free Republic, Mark Levin, Newt......Nuff said.)
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To: momtothree

Cajun didn’t get to be *old Cajun* by taking bait, LOL.


28 posted on 02/05/2012 11:29:48 AM PST by The Cajun (Palin, Free Republic, Mark Levin, Newt......Nuff said.)
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To: The Cajun

LOL!

When the English colonized the New World, they brought their women with them.

When the first French explorers came to Canada, they didn’t.

We’s probably COUSINS! I GUAR-on-TEEE!
};-)


29 posted on 02/05/2012 11:43:32 AM PST by left that other site
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All contributions are for the Current Quarter Expenses.


30 posted on 02/05/2012 11:46:28 AM PST by RedMDer (Forward With Confidence!)
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To: Prospero; ExGeeEye

Thanks.


31 posted on 02/05/2012 4:39:40 PM PST by SunkenCiv (FReep this FReepathon!)
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