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Astronomy Picture of the Day - North Star: Polaris and Surrounding Dust
https://apod.nasa.gov/apod ^ | 11 Apr, 2023 | Image Credit & Copyright: Javier Zayaz

Posted on 04/11/2023 1:36:56 PM PDT by MtnClimber

Explanation: Why is Polaris called the North Star? First, Polaris is the nearest bright star toward the north spin axis of the Earth. Therefore, as the Earth turns, stars appear to revolve around Polaris, but Polaris itself always stays in the same northerly direction -- making it the North Star. Since no bright star is near the south spin axis of the Earth, there is currently no bright South Star. Thousands of years ago, Earth's spin axis pointed in a slightly different direction so that Vega was the North Star. Although Polaris is not the brightest star on the sky, it is easily located because it is nearly aligned with two stars in the cup of the Big Dipper. Polaris is near the center of the eight-degree wide featured image, a digital composite of hundreds of exposures that brings out faint gas and dust of the Integrated Flux Nebula (IFN) all over the frame as well as the globular star cluster NGC 188 on the far left. The surface of Cepheid Polaris slowly pulsates, causing the famous star to change its brightness by a few percent over the course of a few days.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: nasa; sceincehumor
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 move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.

1 posted on 04/11/2023 1:36:56 PM PDT by MtnClimber
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To: MtnClimber

2 posted on 04/11/2023 1:37:11 PM PDT 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; AFPhys; Agatsu77; America_Right; ...
Pinging the APOD list.

🪐 🌟 🌌 🍔


3 posted on 04/11/2023 1:37:49 PM PDT 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

Someone should take a broom to that mess.


4 posted on 04/11/2023 1:39:15 PM PDT by rightwingcrazy (;-,)
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To: MtnClimber
Although Polaris is not the brightest star on the sky,

Anyone who thinks it is the brightest star is seriously confused.

5 posted on 04/11/2023 1:40:58 PM PDT by KarlInOhio (Democrats' version of MAGA: Making America the Gulag Archipelago )
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To: rightwingcrazy
What, are you a clean freak or something?


6 posted on 04/11/2023 1:45:48 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: KarlInOhio

Polaris is in fact the brightest star except for all the other brighter ones.


7 posted on 04/11/2023 1:46:06 PM PDT by Telepathic Intruder
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To: KarlInOhio
Anyone who thinks it is the brightest star is seriously confused.

You can't be Sirius.

8 posted on 04/11/2023 1:47:35 PM PDT 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

That was good.


9 posted on 04/11/2023 1:53:51 PM PDT by Telepathic Intruder
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To: MtnClimber

Polaris is nothing without Kochab.

No direction.


10 posted on 04/11/2023 1:58:19 PM PDT by occamrzr06
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To: MtnClimber

Damn..pollen is everywhere!!


11 posted on 04/11/2023 2:19:34 PM PDT by maddog55 (The only thing systemic in America is the left's hatred of it!)
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To: MtnClimber

Out of all the stars in the sky, Polaris is one of them.


12 posted on 04/11/2023 2:42:24 PM PDT by LukeL
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To: MtnClimber

Wow.


13 posted on 04/11/2023 3:00:40 PM PDT by No name given (Anonymous is who you’ll know me as.)
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To: KarlInOhio

“Right down the line” by Gerry Rafferty:

“You’ve been as constant as the northern star, the brightest star that shines...”

Many people think that. I like Gerry Rafferty but not this line.


14 posted on 04/11/2023 3:05:34 PM PDT by F450-V10
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To: MtnClimber

Dag nabbit, you’ve beaten me to the punch again! Heh.


15 posted on 04/11/2023 3:07:59 PM PDT by AFB-XYZ (Stand up, or bend over)
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To: MtnClimber

That’s exactly what I was thinking.


16 posted on 04/11/2023 3:27:45 PM PDT by DannyTN
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To: MtnClimber

Schroeder plays the piano. I think Pigpen should play a harp and a Hammond B3. Get a band going.


17 posted on 04/11/2023 4:05:25 PM PDT by HenpeckedCon
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To: MtnClimber

Didn’t know about all dat dust out dere…….


18 posted on 04/11/2023 5:28:24 PM PDT by telescope115 (My feet are on the ground, and my head is in the stars. A Man, and proud of it!)
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To: F450-V10

Gerry is his own star now.......................


19 posted on 04/12/2023 5:01:55 AM PDT by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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