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Astronomy

Shiela_M · 1385

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Offline ToeinH2O

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Reply #15 on: February 01, 2020, 01:29:58 AM
Night lights...

« Last Edit: February 01, 2020, 04:05:12 PM by ToeinH2O »



Offline Shiela_M

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Reply #16 on: February 01, 2020, 01:41:35 AM
If we keep going earth will shine brighter than the sun.  Craziness.

"I'm a hazard to my health, don't let me get me"


Offline Shiela_M

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Reply #17 on: February 01, 2020, 02:29:32 PM


If I was primitive and uneducated and I saw this in the sky.  I'd see gods and celestial beings too.  Imagine not knowing what made that beautiful site, but see it every clear night.

"I'm a hazard to my health, don't let me get me"


Offline MintJulie

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Reply #18 on: February 01, 2020, 04:35:59 PM
Night lights...



The northern UP is a great place.  Haven't been up there in a while.

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Offline Shiela_M

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Reply #19 on: February 01, 2020, 04:45:49 PM
Night lights...



The northern UP is a great place.  Haven't been up there in a while.

Spent a 4 day weekend on mackinac island last year.  I think I pet every horse I saw and ate waaaay too much fudge, think I'm still burning those calories.

"I'm a hazard to my health, don't let me get me"


Offline ToeinH2O

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Reply #20 on: February 02, 2020, 11:33:55 AM
High resolution composite photo of the moon, using over 400,000 images.




Offline Shiela_M

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Reply #21 on: February 02, 2020, 11:52:19 AM
Wow, that is a beautiful pic.  So much detail.  Too bad I cant see that detail when I actually look at it.

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Reply #22 on: February 02, 2020, 03:31:36 PM
High resolution composite photo of the moon, using over 400,000 images.



I love it, Toe!

Click this link, and then click image to zoom in.

https://i.redd.it/h8imvrbshee41.jpg

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Offline msslave

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Reply #23 on: February 02, 2020, 03:34:18 PM
Fantastic shot. Hell of a lot of pixels.

Well trained and been made compliant....by our two cats.


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Offline Shiela_M

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Reply #25 on: February 06, 2020, 12:28:05 AM
I was so excited about this up coming super moon, or snow moon, until I realized all this glorious sun and clear skies we've been getting will go away just in time for the weekend when the super moon will take place... the whole weekend.  I truly hope it changes before friday.

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Offline ToeinH2O

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Reply #26 on: February 08, 2020, 05:12:04 PM
Here’s something to get your gears turning on a Saturday morning.

This is a fairly typical galaxy called NGC (New General Catalogue) 7331. It’s a cozy 50M light-years away. Images like this one are a great teaching tool to demonstrate the vastness of space, and just what “fifty million light-years” means.



Imagine you’re a passenger on an intergenerational city-sized starship traveling a few million miles per hour (which is theoretically possible, but it’s hell on your insurance premiums). And this glorious view is what you’re seeing through the windows.

You were born on this starship. You’ll die on this starship. Your parents and grandparents were too, as will your kids and grandkids. Your starship has been hurtling along at a few million miles per hour for CENTURIES. But one day, if all goes well, one of your descendants will set foot on a planet somewhere in that galaxy looming large.

But for all of those generations, the view ahead hasn’t changed. It looks exactly the same distance to you on this day as it did to your great-great-great-grandmother, as it will to your great-great-great-granddaughter. It never appears any closer, even though you’ve been hauling ass towards it for centuries.*

Why?

Because that pittance of time, a mere 8-10 human generations is only 200-300 years (as measured on Earth). That’s less than 1/200,000th of the way to your destination. It would take TWO MILLION human generations traveling at light-speed—which isn’t possible—to make the journey in our starship.

So expecting to wake up one day and say; “Hey, NGC7331 looks closer today. I think we’re getting there!” Nope, your view won’t change. That’s like stepping on a book to get a better look at Jupiter. Are you closer? Sure. But it’s not going to look any different. Not even if you stand on a million books.

And just in case your mind isn’t thoroughly boggled just yet, NGC 7331, at 50M light-years away, is right in the neighborhood. The farthest known observable objects are 275 TIMES farther away than that.

I know... It’s like putting your brain in an orange juicer. ????

[*HOWEVER: According to Einstein’s General Theory, if you were able to achieve a velocity *near to* the speed of light—186,282 m/second. That’s 670M mph—everything onboard the starship, including you, time would slow down relative to your point of departure (hence “relativity”). That is, Earth might have aged 50M years in the time it took for the starship to get there, but you and your fellow travelers might have only aged a few thousand years.]




Offline Shiela_M

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Reply #27 on: February 08, 2020, 05:27:05 PM
May I also add, to further blow your... ah.... mind, that when you look out your ships window, you're not seeing the actual galaxy, but what it looked like millions of years ago, because as you travel to it, light is traveling away from it to meet you, so basically you're looking back in time.  :o

I love this stuff :sign_wow:

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Offline ObiDongKenobi

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Reply #28 on: February 09, 2020, 01:17:15 PM

Even our own sun isn't exactly where we see it as its light takes approx. 8 minutes to reach us.


Princess, would you like to see it light up and hum when I wave it about


Offline Shiela_M

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Reply #29 on: February 09, 2020, 02:47:06 PM

Even our own sun isn't exactly where we see it as its light takes approx. 8 minutes to reach us.



And that's just how long it takes to get from the sun the earth, that particle of light can be stuck traveling around inside the sun for hundreds of years before breaking free of its gravity and fusion

"I'm a hazard to my health, don't let me get me"