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Astronomy Picture of the Day -- Crescent Neptune and Triton
NASA ^ | April 14, 2013 | (see photo credit)

Posted on 04/14/2013 7:57:47 PM PDT by SunkenCiv

Explanation: Gliding silently through the outer Solar System, the Voyager 2 spacecraft camera captured Neptune and Triton together in crescent phase in 1989. The elegant picture of the gas giant planet and its cloudy moon was taken from behind just after closest approach. It could not have been taken from Earth because Neptune never shows a crescent phase to sunward Earth. The unusual vantage point also robs Neptune of its familiar blue hue, as sunlight seen from here is scattered forward, and so is reddened like the setting Sun. Neptune is smaller but more massive than Uranus, has several dark rings, and emits more light than it receives from the Sun.

April 14, 2013

(Excerpt) Read more at 129.164.179.22 ...


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; astronomy; inb4uranusjokes; neptune; science; triton
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[Credit: Voyager 2, NASA]

1 posted on 04/14/2013 7:57:48 PM PDT by SunkenCiv
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To: brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; Mmogamer; ...
New Fan-Run APOD Social Page: Horizon on Facebook

2 posted on 04/14/2013 7:58:29 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
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To: SunkenCiv

Its been a while since I was out that way.


3 posted on 04/14/2013 7:59:31 PM PDT by cripplecreek (REMEMBER THE RIVER RAISIN!)
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To: SunkenCiv

Thanks so much, SunkenCiv.
I like!


4 posted on 04/14/2013 8:02:20 PM PDT by onyx (Please Support Free Republic - Donate Monthly! If you want on Sarah Palin's Ping List, Let Me know!)
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To: SunkenCiv

Cool.

“....and emits more light than it receives from the Sun.”

I am curious now!


5 posted on 04/14/2013 8:11:49 PM PDT by Delta 21 (Oh Crap !! Did I say that out loud ??!??)
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To: Delta 21
Smaller but more massive...

... What?

6 posted on 04/14/2013 8:14:02 PM PDT by wastedyears (I'm a gamer not because I choose to have no life, but because I choose to have many.)
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To: wastedyears
Smaller but more massive... ... What?

Uranus is very large in diameter, but is made up mostly of light gasses. Neptune is smaller in size, but made up of heavier stuff.

7 posted on 04/14/2013 8:17:47 PM PDT by Lurking Libertarian (Non sub homine, sed sub Deo et lege)
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To: wastedyears

Its just packed tighter.


8 posted on 04/14/2013 8:17:51 PM PDT by Delta 21 (Oh Crap !! Did I say that out loud ??!??)
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To: Lurking Libertarian; Delta 21

Massive is still a word used to describe size. The author should’ve said “smaller, but heavier and more dense.” That makes far more logical sense.


9 posted on 04/14/2013 8:19:23 PM PDT by wastedyears (I'm a gamer not because I choose to have no life, but because I choose to have many.)
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To: wastedyears
Massive is still a word used to describe size. The author should’ve said “smaller, but heavier and more dense.”

It's a scientific article. Scientists use the word "mass" instead of "weight," because weight varies with gravity and mass is constant.

10 posted on 04/14/2013 8:25:28 PM PDT by Lurking Libertarian (Non sub homine, sed sub Deo et lege)
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To: SunkenCiv

That is pretty cool.
What a wild world we live in.


11 posted on 04/14/2013 8:26:40 PM PDT by mylife (The Roar Of The Masses Could Be Farts)
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To: Lurking Libertarian
Uranus is very large in diameter, but is made up mostly of light gasses"

Excuse me????

12 posted on 04/14/2013 8:28:28 PM PDT by mylife (The Roar Of The Masses Could Be Farts)
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To: SunkenCiv

Tonight the waxing, crescent Moon is very close to Jupiter.

Conjunction between the Moon and Jupiter
http://dcford.org.uk/news.php?id=20130414_16_100

The Moon and will make a close approach within 2°03’ of each other, the pair being visible in the west in the early evening sky. At the moment of closest approach, the Moon will be at mag -10.6, and Jupiter at mag -2.1, both in the constellation Taurus.

The pair will be too widely separated to fit within the field of view of a telescope, but will be visible to the naked eye or through a pair of binoculars. At a declination of +22°08’ , they will be seen to best advantage in the northern hemisphere; in fact, they will be unobservable from latitudes south of 47°S. At Tacoma, the pair will set 4 hours and 24 minutes after the Sun.

For those with digital setting circles, the precise positions of the Moon and Jupiter at the moment of closest approach will be as follows:


13 posted on 04/14/2013 8:50:00 PM PDT by Jack Hydrazine (I’m not a Republican, I’m a conservative! Pubbies haven't been conservative since before T.R.)
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To: mylife

Completely unexpected news, eh?


14 posted on 04/14/2013 8:51:51 PM PDT by Jack Hydrazine (I’m not a Republican, I’m a conservative! Pubbies haven't been conservative since before T.R.)
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To: mylife

It’s like finding out that there are people who live on Rekdal Road on Camano Island, WA. It’s not quite as gassy as Uranus.


15 posted on 04/14/2013 8:53:38 PM PDT by Jack Hydrazine (I’m not a Republican, I’m a conservative! Pubbies haven't been conservative since before T.R.)
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To: Delta 21

This refers to light in the generalized sense of E-M radiation. Neptune is very cold and does not shine with its own radiation in the visible spectrum ... as you can see in the APOD!


16 posted on 04/14/2013 8:57:42 PM PDT by dr_lew
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To: Jack Hydrazine

Ahhh Hah...


17 posted on 04/14/2013 9:02:40 PM PDT by mylife (The Roar Of The Masses Could Be Farts)
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To: SunkenCiv
" Neptune is smaller but more massive than Uranus, has several dark rings, and emits more light than it receives from the Sun."

I don't care who you are. That's got to intrigue the hell out of anyone.

18 posted on 04/14/2013 9:27:43 PM PDT by Windflier (To anger a conservative, tell him a lie. To anger a liberal, tell him the truth.)
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To: mylife
What a wild world we live in.

Umm....I rather think this is out of this world :-)

19 posted on 04/14/2013 9:29:35 PM PDT by Windflier (To anger a conservative, tell him a lie. To anger a liberal, tell him the truth.)
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To: cripplecreek

Next time you go send a post card back, with a picture, saying:

“Wish you were here!”


20 posted on 04/14/2013 9:39:56 PM PDT by Vendome (Don't take life so seriously, you won't live through it anyway)
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