Really glad I discovered this channel. binge watching, and looking forward to the whole sett (Messier) these really are the objects that ammeters can dream of viewing . knowing what you're seeing makes the whole thing incredible. PS love the simple no nonsense format.
cant remember which video it was in but professor merrifield explained the classification convention for clusters (cant remember if it was open, globular or both). i reckon for each video of a cluster you should just quickly mention the classification so we dont forget how it works, also it could help pad out alot of these videos on similar clusters which seem hard to make. this is my favourite channel on youtube, would love to see some more uploads! thanks brady
If you turn the last nebula up it looks like a light bulb. When explaining the difference in the distances of line of sight objects a diagram from the side view showing the linear differences would be useful.
The actual core explosion (for a supernova) takes about a second, the shockwave reaches the surface in a few minutes to a couple of hours, and then it remains quite bright for several weeks to several months, before fading over the course of many years.
You don't need doppler shifts to determine cluster membership; just the distance to the cluster from main sequence fitting, and the angular diameter of the nebula - as you say, the velocity of the nebula was towards the cluster in any case. As for the rotten egg nebula, if it's sulfur concentration is so high, then it's not "proto"...or a pre-planetary wind...it's a full-fledged planetary nebula.
Why does the protoplanetary nebula have two lobes of different sizes? The jets look pretty symetrical, so I would assume the lobes should be near the same size...
Both the jets and lobes are assymetrical, also with one lobe more neatly curved (facing into the interstellar wind) and the other lobe whispier (trailing). Would love to see a timelapse of this.
I just freaked out, my name is Daniel López, as the author's of one of the planetary nebula pictures. I Love this channel (and all of Brady's channels actually :) ).
Which picture are you the author of? I guess you work, or have worked, at one of the big telescopes - which one was it? Congratulations - whichever picture it is, they are all amazing.
I'm curious if they can make the time to make this video I wonder what they do for the rest of the day , what projects are they doing on their job. Great video hopefully there's more!
Great video - back up to standard. The 'collimated' lobular gas ejection - is that due to the magnetic field of the star? It looks like it must be. But perhaps it is only a trick of the photograph, and really the ejection is more spherically symmetrical? Though it doesn't look as though it can be.
I am 1,675 L the rotten egg just above it looks like a Galaxy Oh your video are super I have watch a lot of and you are very Beautiful, I could sit and listen to you all day.
How long does this proto-planetary nebula phase last? Does it noticeably/observably change over a short period? In other words, and in the interest of science, is it a lava lamp or are we watching paint dry?
I find it not surprising that the nebula is not part of the cluster, without needing to measure the radial velocities. The stars in an open cluster are usually young (
I don't think you're correct. Whether a black hole is formed depends on the mass remaining after the shell is blasted off, i.e. after the formation of the planetary nebula. So the star, which had burned up all his fuel, would be need to have been much more massive then 2-3 solar masses originally or collect more mass after the first collapse. However that may be, the lower the original mass of the star, the older it would likely be, making the difference to the age of the cluster even bigger.
I think that at a certain mass the shell shouldnt blast off. In the core there will be more and more Iron and the star gets more compressed until their isnt enough power from fusion to act against gravity and the star will collapse, followed by a super nova.
If we have been observing such stellar objects for over a century, why are we never shown "movies" of these clusters? Surely, they visibly expand and/or move through space!?!?
VideoNOLA Because when something costs many hundreds of millions of dollars to design, build, launch, and use you don't let it sit looking at just one spot. Astrophysicists fill out request forms to use the telescope. It's very very detailed, including things like their objective and how long they need to use it. One country obviously owns it, but it gets used by many people, and research groups around the world. We would need many dozens more Hubble telescopes to even have a chance of having time to record one spot long enough to make a meaningful video/time lapse.
It should be pointed out that planetary nebulae have nothing to do with planets, and are only called that because in the early telescopes observers mistook them for planets. ☺
It covers the size of a full moon. Ok that sounds pretty impressive, but honestly, I have zero sense of perspective. Maybe someone can tell me how many full moons it would take to cover entire sky?
From wiki: "the term "planetary nebula" is a misnomer that originated in the 1780s with astronomer William Herschel because when viewed through his telescope, these objects resemble the rounded shapes of planets. Herschel's name for these objects was popularly adopted and has not been changed."
I prefer this title: The plasma storm grips the Earth and says Take it! Say my name! Say it! Tell me you love it! I know you love it rough! it has a little more zing to it
She always seems so nice the way she explains galaxies and just as a person. I really enjoy it when you have her on.
I so look forward to your videos. Thank you for another fascinating informative lecture.
lol love Brady's interruptions...specially this one at :52...at a comedically high pitch...
A chipmunk entered the room 😂
Nothing can go wrong on a day that gives you a new DeepSkyVideo! Thanks Dr. Gray and Dr (h.c.) Haran :)
Really glad I discovered this channel. binge watching, and looking forward to the whole sett (Messier) these really are the objects that ammeters can dream of viewing . knowing what you're seeing makes the whole thing incredible.
PS love the simple no nonsense format.
This Messier series is wonderful. Would love much more!
Just watched every single video on this channel from old to new.
cant remember which video it was in but professor merrifield explained the classification convention for clusters (cant remember if it was open, globular or both). i reckon for each video of a cluster you should just quickly mention the classification so we dont forget how it works, also it could help pad out alot of these videos on similar clusters which seem hard to make. this is my favourite channel on youtube, would love to see some more uploads! thanks brady
It's so nice to see you guys still uploading videos :)
Nebulosity, protoplanetary, collimated jets, stellar winds! Dr. Meghan Gray sure has a way with words! :D
I demand more DeepSky and Sixty Symbols videos! Love your videos!
Agree
MZYY me too!
More!
the people have spoken
Thanks cool Science lady. Also thanks Brady.
Great Video!! This is one of My Favourite Open Clusters!!
Amazing, I love science over everything else.
Me too!
I realy do! :)
One of the best deep sky vids, very interesting.
6:30 looks incredutastic, jusr lovely, no words ! THANKS
fluid dynamics at stellar scale is crazy... Knudsen number be damned, supersonic stellar jets are awesome
If you turn the last nebula up it looks like a light bulb.
When explaining the difference in the distances of line of sight objects a diagram from the side view showing the linear differences would be useful.
Man, the sky is so beautiful!
What scales of time are we talking about with supernova or planetary nebula explosions? Seconds, years, millennia?
The actual core explosion (for a supernova) takes about a second, the shockwave reaches the surface in a few minutes to a couple of hours, and then it remains quite bright for several weeks to several months, before fading over the course of many years.
You don't need doppler shifts to determine cluster membership; just the distance to the cluster from main sequence fitting, and the angular diameter of the nebula - as you say, the velocity of the nebula was towards the cluster in any case.
As for the rotten egg nebula, if it's sulfur concentration is so high, then it's not "proto"...or a pre-planetary wind...it's a full-fledged planetary nebula.
If you check the length of these videos, you can see the exact amount of explaining required to make these pictures of stars seem interesting
Excellent as always. Thank you!
Why does the protoplanetary nebula have two lobes of different sizes? The jets look pretty symetrical, so I would assume the lobes should be near the same size...
black hole
;)
I don't know for sure, but it might be caused by its motion through the interstellar medium?
I have to say, that they dont seem to be really symmetrical. Its more the question, why are the jetstreams not of the same size
Both the jets and lobes are assymetrical, also with one lobe more neatly curved (facing into the interstellar wind) and the other lobe whispier (trailing).
Would love to see a timelapse of this.
maybe there is/was more orbital bodies on that side to be vapourized
I could listen to her for days..
I just freaked out, my name is Daniel López, as the author's of one of the planetary nebula pictures. I Love this channel (and all of Brady's channels actually :) ).
Which picture are you the author of? I guess you work, or have worked, at one of the big telescopes - which one was it? Congratulations - whichever picture it is, they are all amazing.
thisnicklldo No! I just share the same name as the author of one of the pictures. I don't work in the field of astronomy
I love your videos! Just what RUclips needs.
Show some of the view in Baade's Window
I'm curious if they can make the time to make this video I wonder what they do for the rest of the day , what projects are they doing on their job. Great video hopefully there's more!
Millions of KM/hour. Given the scales involved would we see any observable change over a 6 month - several year timespan?
The rotten egg nebula looks like a supernova fizzle. It started off center, and blew apart before it could go competely nova?
Are there any examples of starts colliding that we have seen through a telescope?
how about IC 1101
pretty interesting story , and thats beautiful pictures
All these videos make me wish i'd actually tried in my exams and got to Nottingham
Great video - back up to standard. The 'collimated' lobular gas ejection - is that due to the magnetic field of the star? It looks like it must be. But perhaps it is only a trick of the photograph, and really the ejection is more spherically symmetrical? Though it doesn't look as though it can be.
This interstellar medium that the collimated jets slam into - is it also between galaxies.
Please comment on the Thunderbolt Project.
How many years does the nebula last ? And how fast does the super nova explode and then lasts ? How big are they in general ? Thanks for the videos.
I love these videos :-)
Hah, I know some of the people who took that picture :P The Mt. Lemmon Sky Center is one of my favorite places
I love the idea of the smell of celestial objects. Delightful, even if it stinks.
I am 1,675 L the rotten egg just above it looks like a Galaxy Oh your video are super I have watch a lot of and you are very Beautiful, I could sit and listen to you all day.
Is the photo real color? You should always say so, especially as an astronomer.
How long does this proto-planetary nebula phase last? Does it noticeably/observably change over a short period? In other words, and in the interest of science, is it a lava lamp or are we watching paint dry?
Awesome
I find it not surprising that the nebula is not part of the cluster, without needing to measure the radial velocities. The stars in an open cluster are usually young (
Nope, stars with more than 2-3 Sun masses collapse into a blackhole. For a planetary nebula we need a star with roughly the same mass as our sun.
I don't think you're correct. Whether a black hole is formed depends on the mass remaining after the shell is blasted off, i.e. after the formation of the planetary nebula. So the star, which had burned up all his fuel, would be need to have been much more massive then 2-3 solar masses originally or collect more mass after the first collapse. However that may be, the lower the original mass of the star, the older it would likely be, making the difference to the age of the cluster even bigger.
I think that at a certain mass the shell shouldnt blast off. In the core there will be more and more Iron and the star gets more compressed until their isnt enough power from fusion to act against gravity and the star will collapse, followed by a super nova.
Thought I heard Brady's mum around one minute in asking about m47
wow.. I love this video! :-)
Looks like a light-bulb to me.
or .....apple and a bullet
Do the Cocoon Nebula, even though it's not a Messier object
Imagine how living on a planet would be in a cluster. Although it's very unlikely that planets cuuld exist there except maybe gas giants.
If we have been observing such stellar objects for over a century, why are we never shown "movies" of these clusters? Surely, they visibly expand and/or move through space!?!?
VideoNOLA
Because when something costs many hundreds of millions of dollars to design, build, launch, and use you don't let it sit looking at just one spot.
Astrophysicists fill out request forms to use the telescope. It's very very detailed, including things like their objective and how long they need to use it.
One country obviously owns it, but it gets used by many people, and research groups around the world.
We would need many dozens more Hubble telescopes to even have a chance of having time to record one spot long enough to make a meaningful video/time lapse.
moree!
It should be pointed out that planetary nebulae have nothing to do with planets, and are only called that because in the early telescopes observers mistook them for planets. ☺
"If you could smell"
Waiting? So scientists haven't invented the smelloscope yet? What have they been wasting their time on? Fruit flies?
Wow!
The CCS-Class Battlecruiser nebula.
@ 7:42 it looks a bit like a duck face on to me.
It covers the size of a full moon. Ok that sounds pretty impressive, but honestly, I have zero sense of perspective. Maybe someone can tell me how many full moons it would take to cover entire sky?
Why is it called a "planetary nebula" when it's produced by a star? Shouldn't it be a "stellar nebula"? :P
Because that's what it looked like to Messier when he found out the first one and so he named those objects after planets .
From wiki: "the term "planetary nebula" is a misnomer that originated in the 1780s with astronomer William Herschel because when viewed through his telescope, these objects resemble the rounded shapes of planets. Herschel's name for these objects was popularly adopted and has not been changed."
Anyway, for now this M46 could be called Rotten Egg Cluster.
If someone would tidy them up, then they wouldn't be so messy.
Astronomy is the most amazing group of ultra nerds
It looks like a duck coming at ya
I would have called it the Maraca Nebula.
It looks like a maraca.
To the smelloscope!!
no way its the math and chemistry video guy
The Jeannie Nebula
SHE LOOKS LIKE RIPLEY
Bowling pin.
EXPOSED: The Plasma Storm that will Irradiate the Earth. "We will not find it gentle." ~ You might get a few more clicks with this title. ♡
Matt Smith #46 will shock you!
I prefer this title: The plasma storm grips the Earth and says Take it! Say my name! Say it! Tell me you love it! I know you love it rough!
it has a little more zing to it
Matt Smith This plasma storm envelopes the earth: you won't believe what happens next!
Come off it man, we all know what that's used for, it ain't no vase. You do put herbs in it though.
I'm not saying it's alien farts, but...
I want a girlfriend like her.
back then there was no light pollution anywhere in the world
"We will be enveloped" by a CGI fairy tale someday kiddies. give me a break
Probably the sexiest astronomer alive? (no offence to prof. Merrifield...)
nejeb alert
Wooh! First
So beautiful