M81 - Bode's Galaxy - Deep Sky Videos
ฝัง
- เผยแพร่เมื่อ 13 ก.ย. 2024
- Professor Mike Merrifield discusses Bode's Galaxy, known as M81 or NGC 3031.
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Testing Density Wave Theory with Resolved Stellar Populations around Spiral Arms in M81
arxiv.org/abs/...
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Video by Brady Haran and James Hennessy
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More Messier Object videos: bit.ly/MessierObjects
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The professor's photo is actually pretty good, you can even see the arms
"And they found nothing." The greatest answer in all of science is, "I thought something was there, and I tested it, and turns out there's nothing." It shows that science is the search for truth, not for the what the scientists think is happening.
If we all could be so humble about our often misdirected, preconceived notions...
in this case yes. but this doesn't mean all 'science' is like this, despite what some people may claim.
I actually giggled. But hey, that's what science is like!
@@michaelcollins966 But as your quotes imply, "science" that doesn't do this, isn't science.
false.
Thanks to this channel, my internet in astronomy has grown 10 fold! I've recently purchased a telescope and it has been incredible to pick out a few things I've seen videos on.
Get an adapter for any camera you have. Any sensor is better than the eye for collecting lots of photons. You’ll be amazed
I often drop everything when I see a new post from Brady, but especially so when it's by Professor Merrifield. Like his backyard picture taking, he and Brady have helped me stay sane this year (although I'm not exactly sure if I'm in the clear yet-and we still have a few more days...).
If any good has come from COVID-19, it is Brady working with professors outside their normal work environments. I don't know if I'm just made more comfortable by the casual environment, or if there's anything different in the conversation, but I do know I very much enjoy this change! Professor Merrifield's home astronomy helps makes the connection, in the sense of "hey, wait, I could do that too!". Well done, one and all!
Welcome back!
Merrifield is wonderful to listen to. :D I love hearing him speak he's passionate and funny.
Brady asks the best questions... He literally asks the most simple/eloquent questions that get right to the point ☝️
Love the vids
0:10 "This is one I've been saving up"
*Finger pyramid of evil contemplation*
Excellent.
Mike is finding out just how addictive amateur astrophtography is. Maybe more of academia should be doing this. It would give them more appreciation of their professional interests. :)
Welcome to the Brady show.
A Deep Sky Video before bed! Just what the Doctor ordered. The ingenuity of the scientist who have devised the methods to study the universe will never be boring.
Never stop brady!!!
I’ve been waiting for this one
Just took a picture of M81 and M82 two nights ago and surprisingly even had that small galaxy nearby in the picture (NGC 3077) ! Started with the camera and the telefoto-lens at 300 mm on my star tracker. And after it all went so well I even got my 6'' SC-telescope out and put it on the star tracker, although it's too heavy - but it worked out fine! And as professor says: It makes it feel so much more real when you've taken pictures yoursel. And it's so much fun to go to the playlist of DSV and enjoy the video (again, of course 😉). Now over to M82!
My favourite galaxy that I have never seen (observed) as it’s to far north from Australia so it does not rise above the horizon.
Bode's nebulae are deep sky fuzzies I've seen in my own back garden, not seen as much detail as Professor Mike though, but it is fascinating to see two entire galaxies in a single image.
Curious what telescope the professor is using. He takes pretty good pictures
Thanks Prof. Mike !!
Beautiful galaxy
Is there a more beautiful spiral galaxy? I'm struggling to think of one!
NGC 1300 is my personal favorite.
I like NGC 1300 the best too, but I also like the flocculent types like NGC 2841 or NGC 4414.
What about the Milky Way? Is that a "Grand Design" galaxy? I think it probably is, but I'm no astronomer.
Hard to tell from where we are within it, but probably fairly symmetric, as it has a central bar, which tends to produce large-scale coherent spiral structure.
@@AstroMikeMerri Thank you, Professor!
It's believed to be a "multi-armed" spiral, which is in between flocculent and grand design. Look up NGC 6744, thought to be a very Milky Way-like nearby galaxy.
Keep it up Professor!
props for taking your own astronomical pictures Pr. Merrifield, it's really not easy, as well as expensive and time consuming, personally I had to give up on it. Pretty good picture too ! I assume you use a Dobsonian telescope and stacked pictures ?
That is a serious galaxy-shaped galaxy!! If you asked an 8 year old to draw one, it would probably look like this
If those arms in galaxies are density waves, that means they propagate at the speed of sound, right? in that case it would take unimaginable times for them to visibly shift, or revolve around the whole galaxy.
Can you imagine some galaxy-spanning civilization living there and we're like "oh this is Bode's galaxy!" I reckon those guys would be like "uuuhm... no it's not!"
How is the perspective so different between Prof. Merrifield's photograph and the one resolved from the Hubble telscope? I would imagine the perspective wouldn't change that much between a telescope on the earth and the hubble telescope for something that is 12M light years away.
Personally, I like Prof Mike's choices in image processing to that of the Hubble team.
i've been to m81 galaxy. the trick behind galaxy travel is using dark energy fuel engine
Fantastic!
At 6:41 is that M82 off to the right of M81? I remember being able to see both of these galaxies in a single wide-view lens. Really neat how one is top-down, one is edge-on.
Yippee!
Literally looking at m81 and m82 rn
But the spiral arms are brighter and bluer because they have more star formation and thus younger stars, right? Or has that been discarded?
I think most of those pictures were taken in the back yard telescopes. You need to stack hours of exposure to get yours to be better. You'd be surprised how much better it can be. I did this and M82 in one picture and I think I exposed for 12 hours. A lot of light pollution but it came out ok. I'm going to do it again on much darker skies hopefully.
Coolest galaxy ever. But you guys missed a golden opportunity. You should have used the 30,000 pixel Hubble images and zoomed in more and doscribed the nebula! :)
Q; When we see pictures of the Milky Way (as you have here) are the dark areas in the picture dust, or ..?
Yes!!
His picture is actually really impressive? What telescope did he use?
So does this galaxy spiral the other direction in the Southern Hemisphere?
Could it be the same thing that makes whirlpools in the Bermuda Triangle that makes spirals?
Could there be dark matter gears, as yet invisible, drawing the galaxy like a Spirograph?
Has that been tested? It should be. Or ought to be....
In simulations of colliding galaxies it seems like there is always a time when there is a two-arm structure.
The person who made all these stuffs must be really great. One day, I will meet him and he will show me more galaxies and universes.
How long does it take for this Galaxy to make a complete rotation?
Make a video of how you would navigate the galaxy and find your way home!
Even at the speed of light, you'd die of old age before you had a chance to do much navigating around the galaxy.
You can use bright uncommon objects to calculate you location. For example Pioneer and Voyager carry maps of nearby pulsars. Aliens can use map to locate where Sun was at the launch time.
My home
If we find a large black hole outside the Milky Way that our galaxy's light is wrapping around, and returned to us, we could snap a photo of the Milky Way, at least as it appeared some several millions of years ago.
...like water spiralling down the drain...
(there have been studies that use water as a galactic substitute)
Mandelbrot could give you a very wonderful mathematical answer if he were still around.
Hello. Internet. Please.
I'm too far south to see this one :(
Too many "you knows" . I wonder what he would think if he listened to himself. Do very educated people speak this way?
Are these professors actuality getting 80% of their wages for..... basically doing nothing? Are they on Furlough? Just wondering.
13:43 I love that. Do you love me? 😍💋 💝💖❤️