Posted: 26.03.2019, 06:24
The main source, Steinicke's NGC/IC catalog, is probably fine. However, I'm having trouble tracking down the supplementary sources. There might also be newer sources for nearby galaxies.
Real-time 3D visualization of space
https://celestiaproject.space/forum/
https://celestiaproject.space/forum/viewtopic.php?f=10&t=18684
I am very worried about how the tool calculates the orientation of the galaxy relative to the Earth. Or was the necessary information in the source?LukeCEL wrote:The main source, Steinicke's NGC/IC catalog, is probably fine. However, I'm having trouble tracking down the supplementary sources. There might also be newer sources for nearby galaxies.
Art Blos wrote:I am very worried about how the tool calculates the orientation of the galaxy relative to the Earth. Or was the necessary information in the source?
This is the same site that was listed in the original file with the galaxies. The old one is accessible only from the web archive, and by the name of the project I managed to find out where it moved. The appearance of the main page has not changed since.LukeCEL wrote:Not sure if this is the right link
norinonoroi wrote:What kind of information do you need to include a star? Right Ascension, Declination, distance (from parallax), magnitude, etc?
UY Scuti's currently estimated to be 1708 Rsun actually, which's a bit smaller than 1800, though if you add the 192 Rsol margin of error, that adds up to 1900 Rsol.Lafuente_Astronomy wrote:As you can see, its Radius size is at an impossible 3900 Rsun! If I remember, the actual largest discovered star, UY Scuti, only has a radi of 1800+Rsun. So, this one had to be the wrong size for the star.
Eric Nelson wrote:UY Scuti's currently estimated to be 1708 Rsun actually, which's a bit smaller than 1800, though if you add the 192 Rsol margin of error, that adds up to 1900 Rsol.
Plus I actually made a file for Stephenson 2-18 via: viewtopic.php?f=6&t=20398&p=153995&hilit=red+supergiant#p153995
Eric Nelson wrote:Then it was reported the GAIA parallax is unreliable for the measurements due to a very high level of astrometric noise until improvements in observations are made in the future.
More information on the Gaia parallax here: https://doi.org/10.1051/0004-6361/201833051
There are no firm plans for a Gaia successor as far as I know. The idea has been floated, and I think we would all love to see that, but there might be some benefit to waiting a bit becauseAnd of course, if I remember, ESO has been planning a GAIA successor for sometime now