The wavelengths (colours) of the two objects look similar which would suggest to me that they were the same distance, but could the off-centre one be a foreground star that is dying and therefore yellow/orange?
by ElisabethB moderator
Hi Nemesis-of-the-vole and welcome to the Zoo
The central object, which you are supposed to classify is a disk or spiral seen edge on. The object, bottom right, is a foreground star from our galaxy
Happy hunting ! 😄
Just to add to ElisabethB's excellent response ... in general, a deep yellow-orange color, in a star or a galaxy, may be an indication of 'old age', but sometimes the image processing goes a bit too far and the colors are artifacts.
In this image, the star has a funny pink/salmon edge, which is entirely an artifact.
In galaxies, yellow-orange often signifies not so much 'dying stars' as a lack of young, massive stars (which tend to be blue), which are generally gone within a few (tens of) million years. While some stars in yellow-orange galaxies are indeed 'dying' (they've entered the red giant phase, pretty much a last gasp, before running out of fuel completely), the vast majority may not have even entered middle age.
by Budgieye moderator
some reading about colours
Zooite Guide to SDSS Spectra
You can judge the distance of galaxies by their colours.
Colours of Galaxies in SDSS : Redshift chart