Moving to hive by svemirac

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· @svemirac · (edited)
$33.45
Moving to hive
Fuck you Justin, we're moving to Hive.

![Fuck Justin Sun](https://cdn.steemitimages.com/DQmQVgFgxxxpN1jEZwSYH1tfxjynXikKBcTPwtSfxhTMCVY/fuck.gif)
👍  , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and 452 others
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vote details (517)
@tomlee ·
$0.03
How are spectral lines used to determine composition of stars?
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vote details (2)
@svemirac ·
$0.02
Well... Here is the solar spectrum - much more professional and beautiful than the one I provided.
<img src="https://solarsystem.nasa.gov/system/resources/detail_files/390_highresolutionsolarspectrum1200w.jpg">

All these black spots, are spectral lines - and you see they happen in different colors.

Now - different color = different energy. 
Red - lowest energies, Blue - highest energies. 

All elements and atoms can only absorb a photon with specific amount of energy.  Meaning - on a wavelength 656.3 nm we have a hydrogen line (Hα) H-alpha. (red color), there is a green line of Iron, K, Mg and stuff. 

Also, Helium is found first on the Sun, using spectral lines, and then found on earth, hence the name Helios-Helium. But yeah, we have all the lines of the elements in periodic table - in lots of variations. and simply matching them with the spectra we get (with wavelengths they are), we can say hey... THe sun has IRON (Fe) which is ionized 11 times (misses 11 electrons).

Here is a nice stuff to read on for more info and probably better explanation:
https://www.explainxkcd.com/wiki/index.php/1733:_Solar_Spectrum

If you have more questions shoot :)
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vote details (2)
@enjar ·
$0.03
It is very interesting stuff indeed! I remember reading about light waves when I was much younger and thinking it was magic. Still blows my mind the amount of information that can be gathered just from light.
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vote details (1)
@svemirac ·
Well it is a magic in a way! :) 
The whole astronomy is based on extracting information from light - It's just so awesome! :)
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@inertia ·
$0.03
I always carry a few of these, in case I need to do a quick spectral analysis on something.

[![Photo on 7-19-19 at 8.06 AM #2.jpg](https://cdn.steemitimages.com/DQmPxzpNydQSxANyLAkr1fV9qsnnXH2YdXJKw4q5jbPmB1y/Photo%20on%207-19-19%20at%208.06%20AM%20#2.jpg)](https://cdn.steemitimages.com/DQmPxzpNydQSxANyLAkr1fV9qsnnXH2YdXJKw4q5jbPmB1y/Photo%20on%207-19-19%20at%208.06%20AM%20#2.jpg)
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vote details (3)
@svemirac ·
Haha, that is just awesome! Never seen it :)
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@lemouth ·
t8s5yy0fy
Me too. This is really cool! :)
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vote details (1)
@virus707 ·
Thank you for your continued support towards JJM. For each 1000 JJM you are holding, you can get an additional 1% of upvote. 10,000JJM would give you a 11% daily voting from the 700K SP virus707 account.
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@steemstem ·
re-svemirac-spectral-lines-playi-1563525530-20190720t003957091z
<div class='text-justify'> <div class='pull-left'> <center> <br /> <img width='200' src='https://res.cloudinary.com/drrz8xekm/image/upload/v1553698283/weenlqbrqvvczjy6dayw.jpg'> </center>  <br/> </div> 

This post has been voted on by the **SteemSTEM** curation team and voting trail. It is elligible for support from <b><a href='https://www.steemstem.io/#!/@curie'>@curie</a></b>.<br /> 

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@angryman ·
>Here is a photo from 60cm telescope, I took some years ago. It is Dumbell nebula which is planetary nebula with green and red emission lines.

Nebula ... :>)
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@svemirac ·
A bunch of gas hanging around bound by gravity. :)
The best-known catalogue of nebulous objects in the sky is made by Messier - all the things can be seen from Earth - most of it with just binoculars.  They are just diffuse and foggy. :) 
IF that was the question at all :D
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@angryman ·
$0.06
Thanks for the response @svemirac...

I wasn't asking a question lol … I was merely attempting to show my enthusiasm for your posting the planetary nebula photo that you took.
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vote details (1)
@farizal ·
We have yet to discover a ghost from all the known spectrum.
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@inertia ·
How do you separate the different doppler sources when measuring velocity?  For example, if an object is traveling toward us, but the object is also experiencing universal expansion, is it possible for the doppler shift to disappear?
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vote details (2)
@svemirac ·
$0.23
Excellent question - short answer: hypothetically yes, but we would know it is cancelled out depending on its distance/environment/companions.
 
First, we need to divide space into two stages - low redshift and high redshift which can be interpreted as: present time(13.8 by old universe), young universe. 

present time = redshift from the expanding of the universe is z=0, as we go back in time redshift grows. 

Now, in the local Universe, we can observe stars and all variety of stuff out there while in the high redshift we are bound to galaxies and all sorts of raging formations. The farthest single star that was detected (in 2018) is on redshift z =1.5 (9 billion light-years away.)

Also - another thing that needs to be mentioned - things in space tends to cluster. and here are two images for that
Actual Survey of galaxies  (observable universe - obviously) 
<img src="http://www.2dfgrs.net/Public/Pics/2dFzcone_big.gif">

3D simulation of the cosmic web structure 
<img src="https://www.universetoday.com/wp-content/uploads/2010/12/cosmic_web_3smaller.jpg"> 
we can see that galaxies(every light dot) tend to group up together into nodes and filaments - but there is also the dark patches - called voids.

Why am I talking about this  - Simply because it is very rare that we have wanderer stars and systems. It's all somehow grouped and organized - when it is organized (for example star clusters) all the stars inside tend to have relatively the same properties, and they are on the same distance(cosmological redshift) - if there is a star inside that is going nuts (blueshift) we would see it as bluer than all other ones (unless we do the cosmological redshift reduction - then there would be some in blue some in red).
To conclude we expect blueshift in our local universe, where we can observe motion of stars/planets. 
For example if we look in the andromeda - all the stars in there have blueshift (even tho 50%(random number) of stars have different true and radial velocities).  It is the same with cosmological redshift - it dominates, but we can subtract it - and get their velocities.

I hope any of this makes sense - but here is an awesome video you have probably already checked upon :)

https://www.youtube.com/watch?v=rENyyRwxpHo
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vote details (1)
@ocdb ·
re-svemirac-spectral-lines-playi-1563525530-20190724t100411104z
You got a 46.34% upvote from @ocdb courtesy of @svemirac!  :)

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