798
edits
Changes
Jump to navigation
Jump to search
Line 98:
Line 98: + +
→Repetition claim of time and location
:::Well, first of all I don't recall seeing the "± 1,600" part in your edit. Second of all, what are your assumptions underlying that claim? How is that claim made, what observation and assumptions is it based on?--[[User:Aschlafly|Andy Schlafly]] 13:50, 20 January 2010 (EST)
:::Well, first of all I don't recall seeing the "± 1,600" part in your edit. Second of all, what are your assumptions underlying that claim? How is that claim made, what observation and assumptions is it based on?--[[User:Aschlafly|Andy Schlafly]] 13:50, 20 January 2010 (EST)
::::It is in the Astrometry section under distance of the Night Sky Template in the article. Distances of the nebula was done by using spectroscopy, which determines expansion velocity and comparing this with the nebula's angular expansion over time (using images over years[http://apod.nasa.gov/apod/ap011227.html]), using this we can calculate (within a margin) it's distance. The most precise measurement is around 6,300 light years, if you want, read the long technical explanation here.[http://adsabs.harvard.edu/abs/1973PASP...85..579T]. --[[User:BMcP|BMcP]] 14:03, 20 January 2010 (EST)
== images uploaded ==
== images uploaded ==
[[Conservapedia:Image upload requests#Astronomy Images|your images, sir]] [[User:JacobB|JacobB]] 17:56, 9 January 2010 (EST)
[[Conservapedia:Image upload requests#Astronomy Images|your images, sir]] [[User:JacobB|JacobB]] 17:56, 9 January 2010 (EST)