Thank you, lady, that was an awful lot of work to do to answer what was an off-hand and quite silly question.
You are a good person. I hope you have a lovely Christmas.
Thank you for putting so much effort into answering a silly notion. You should try being a teacher.Ann wrote: ↑Fri Jun 12, 2020 3:54 pmCuriousChimp wrote: ↑Thu Jun 11, 2020 10:03 pm
Why would Ellipticals have interior discs of gas? Surely that's a trick Spirals are best known for? Could there be a disc-forming bit of physics that is only apparent over smooth, large-scale regions with little mass density such as galaxies? Something magneto-hydro-dynamic or hydrogen-bondy? Some small influence that only shows up when everything else is stable? Or do we have an explanation for Spirals?
It's a great, big, huge, complicated Universe and nothing's every as easy and simple as it looks at first glance.Chris Peterson wrote: ↑Fri Jun 12, 2020 1:35 pm
Reddening is a tricky thing in astronomy, because it's not reliably detectable. That's because it's not true reddening (as with redshift) where sources get shifted in wavelength- something that is obvious spectroscopically, but just a change in the balance of a range of wavelengths.