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> The spiral structure was first identified by examining the simulation in the Hayden Planetarium in preparation for a new space show that describes and visuali

> The spiral structure was first identified by examining the simulation in the Hayden Planetarium in preparation for a new space show that describes and visualizes the Oort cloud. That's a pretty cool way to discover something like this. Here is the simulation animation: https://drive.google.com/file/d/1TuacHdAeZ5J8wNAJvlYv435x9Oj6Bhhb/view?usp=sharing https://drive.google.com/file/d/1TuacHdAeZ5J8wNAJvlYv435x9Oj...

tristramb 1y ago
You might also appreciate W. W. Morgan's account of his discovery of the Perseus Spiral Arm of our Galaxy in his observational data on OB stars: "This was in the fall of 1951, and I was walking between the observatory and home, which is only 100 yards away. I was looking up in the sky ... just looking up in the region of the Double Cluster [in Perseus], and I realized I had been getting distance moduli corrected the best way I could with the colors that were available, for numbers of stars in the general region ... Anyway, I was walking. I was looking up at the sky, and it suddenly occurred to me that the double cluster in Perseus, and then a number of stars in Cassiopeia, these are not the bright stars but the distant stars, and even Cepheus, that along there I was getting distance moduli, of between 11 and 12, corrected distance moduli. Well, 11.5 is two kiloparsecs ... and so, I couldn’t wait to get over here and really plot them up. It looked like they were at the same distance ... It looked like a concentration ... And so, as soon as I began plotting this out, the first thing that showed up was that there was a concentration, a long narrow concentration of young stars ... There are HII regions along there too ... And that was the thing that broke [the problem] down." Full article here: https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?2008JAHH...11....3S&defaultprint=YES&filetype=.pdf https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_que...
YesThatTom2 1y ago
The ads for Hayden Planetarium show mostly highlight that it’s narrated by Pedro Pascal. But, yeah, the spiral thing is cool too.
- AStonesThrow 1y ago
  The past few planetarium shows in my neck-of-the-woods have featured narration by the likes of David Tennant and Diego Luna. As I understand it, these shows are sort of syndicated and shared among many locations. Some of them were several years old.

tristramb 1y ago

You might also appreciate W. W. Morgan's account of his discovery of the Perseus Spiral Arm of our Galaxy in his observational data on OB stars: "This was in the fall of 1951, and I was walking between the observatory and home, which is only 100 yards away. I was looking up in the sky ... just looking up in the region of the Double Cluster [in Perseus], and I realized I had been getting distance moduli corrected the best way I could with the colors that were available, for numbers of stars in the general region ... Anyway, I was walking. I was looking up at the sky, and it suddenly occurred to me that the double cluster in Perseus, and then a number of stars in Cassiopeia, these are not the bright stars but the distant stars, and even Cepheus, that along there I was getting distance moduli, of between 11 and 12, corrected distance moduli. Well, 11.5 is two kiloparsecs ... and so, I couldn’t wait to get over here and really plot them up. It looked like they were at the same distance ... It looked like a concentration ... And so, as soon as I began plotting this out, the first thing that showed up was that there was a concentration, a long narrow concentration of young stars ... There are HII regions along there too ... And that was the thing that broke [the problem] down." Full article here: https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?2008JAHH...11....3S&defaultprint=YES&filetype=.pdf https://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_que...

YesThatTom2 1y ago

The ads for Hayden Planetarium show mostly highlight that it’s narrated by Pedro Pascal. But, yeah, the spiral thing is cool too.

AStonesThrow 1y ago
The past few planetarium shows in my neck-of-the-woods have featured narration by the likes of David Tennant and Diego Luna. As I understand it, these shows are sort of syndicated and shared among many locations. Some of them were several years old.