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Astronomy Picture of the Day - Conjunction after Sunset
APOD.NASA.gov ^ | 19 Dec, 2020 | Image Credit & Copyright: Alireza Vafa

Posted on 12/19/2020 2:38:01 PM PST by MtnClimber

Explanation: How close will Jupiter and Saturn be at their Great Conjunction? Consider this beautiful triple conjunction of Moon, Jupiter and Saturn captured through clouds in the wintry twilight. The telephoto view looks toward the western horizon and the Alborz Mountains in Iran after sunset on December 17. The celestial gathering makes it easy to see Jupiter and fainter Saturn are separated on that date by roughly the diameter of the waxing crescent Moon. On the day of their Great Conjunction, solstice day December 21, Jupiter and Saturn may seem to nearly merge though. In their closest conjunction in 400 years they will be separated on the sky by only about 1/5 the apparent diameter of the Moon. By then the two largest worlds in the Solar System and their moons will be sharing the same field of view in telescopes around planet Earth.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: nasa
To be added or removed from the Astronomy Picture of the Day ping list please send me a request via "Private Reply" (Mail).

For more detail go to the link and click on the image for a high definition image. You can then zoom by moving the magnifying glass over an area and then clicking. The side bars will move the zoomed area over the photograph.

1 posted on 12/19/2020 2:38:01 PM PST by MtnClimber
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To: MtnClimber

2 posted on 12/19/2020 2:38:27 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; America_Right; Art in Idaho; AZ .44 MAG; ...
Pinging the APOD list.

🪐 🌟 🌌


3 posted on 12/19/2020 2:39:04 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: MtnClimber

Not to be confused with “Afternoon Delight.”


4 posted on 12/19/2020 2:41:23 PM PST by BenLurkin (The above is not a statement of fact. It is either opinion, or satire. Or both.)
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To: MtnClimber
Only two days until conjunction. Grtting low in the SW horiaon at sunset.

Jupiter orbital year - 11.86 Earth years

Saturn orbital year - 29.44 Earth years

5 posted on 12/19/2020 2:43:00 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: MtnClimber

Beautiful


6 posted on 12/19/2020 2:51:42 PM PST by Puppage (You may disagree with what I have to say, but I shall defend to your death my right to says it.)
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To: MtnClimber

How close to “completely across the solar system” are they?

Our moon is a small crescent but the 2 planets are complete disks now so they relatively on the other side of the sun from us.(?)


7 posted on 12/19/2020 3:17:08 PM PST by Delta 21 (Get off your ass and earn it!)
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To: MtnClimber
Almost...


8 posted on 12/19/2020 3:24:58 PM PST by Delta 21 (Get off your ass and earn it!)
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To: Delta 21
No, they are on the same side of the sun right now. Mars is too and that is why three Mars probes were launched in July.

When the planets outside earth are on the opposite side of the sun they would be overhead during day time.

9 posted on 12/19/2020 3:27:38 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: Delta 21

Post 8 shows it. If you were looking at the post 8 diagram from above the orbit plane. you would be looking down on Earth’s north pole and Earth would be spinning CCW and orbiting the Sun CCW. So you can see why now Jupiter and Saturn are visible now just after sunset. Soon they will be overhead in day time.


10 posted on 12/19/2020 3:36:28 PM PST by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: MtnClimber

Just magnificent.


11 posted on 12/19/2020 3:38:27 PM PST by AFB-XYZ (Option 1 -- stand up. Option 2 -- bend over.)
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To: MtnClimber

Thanks for posting. Purchased new telescope to see this but as usual, we get cloud cover in winter (Indiana)that last for months so pictures may be the only way I will see it.


12 posted on 12/19/2020 4:35:39 PM PST by unitedwestand (The day will come....)
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To: MtnClimber
Soon they will be overhead in day time.

They are overhead during the day NOW. Jupiter and Saturn currently rise and set a little over 2 hours after the sun, with that time getting shorter every day. They are currently on the far side of the sun from us, and on January 23 Saturn will reach Superior Conjunction, when it will pass behind the sun. Jupiter will follow on January 28th.

13 posted on 12/19/2020 4:51:39 PM PST by ETCM
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To: MtnClimber

I just stepped outside and here in Phoenix it is a totally clear sky. Sure enough Saturn is like a tiny star shinning just above and a little to the left of the much brighter Jupiter . Only need your eyes to see it. My binocular view is too shaky to see Jupiter’s moons much less any of Saturn’s.


14 posted on 12/19/2020 5:19:49 PM PST by Nateman (Democracy dies with voted fraud darkness.)
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To: BenLurkin

Sky rockets in flight...


15 posted on 12/19/2020 5:26:22 PM PST by Fledermaus (The Republican Party is DEAD. Rot in hell ALL of them!)
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To: MtnClimber
I remember back in the 1990s, we went to a Cowboys game in the old stadium and we were standing outside waiting to get in and somebody in the crowd said, "Look up there they said that a bunch of planets were going to line up tonight." Something like 6 or 7 planets were lined up as pretty as you please.

It wasn't lucky for the Cowboys cuz they lost the game.

16 posted on 12/19/2020 6:47:43 PM PST by Slyfox (Not my circus, not my monkeys )
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To: Slyfox

It looks like Pluto is in the line up but its way out there and hardly even shines anymore since getting demoted.


17 posted on 12/19/2020 8:09:36 PM PST by Delta 21 (Get off your ass and earn it!)
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To: MtnClimber

We’ve been getting mostly clouds at night here in Connecticut but on Friday night, got a nice glimpse of this. Hopefully it clears out tonight but we have heavy overcast right now with some light snow on the way for the afternoon.


18 posted on 12/20/2020 7:22:56 AM PST by SamAdams76 (Orange Man GOOD!)
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