2 green clouds

• by newolder

  http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237659931071808195 shows the central cloud but the arc @ 10 o'clock looks related...

  Posted September 16, 2012 11:54 AM

• by vrooje admin, scientist

  I think those clouds are part of M31. From SkyServer, go to Navigate and zoom way out -- they look like they're on the edge of the disk. Beautiful!

  Posted September 16, 2012 12:20 PM

• by newolder

  yes, it is lovely but where do i read the red-shift of these photons, i wonder? :dunno:

  edited to add: --- if it is associated with M31 Andromeda (and has not been ejected in a direction away from Milky Way) then wouldn't it have a blue-shift ? :ask:

  Posted September 16, 2012 2:11 PM

• by vrooje admin, scientist

  If there is a redshift available in SDSS you will see it on SkyServer -- it will be a spectroscopic target and have a SpecObjID. This one doesn't so it's not easy to verify what its velocity (possibly a blueshift) is.

  Posted September 16, 2012 2:34 PM

• by newolder

  :thumbup:
  beautiful and curious, now. 😃

  Posted September 16, 2012 5:26 PM

• by elizabeth_s

  Nice # Planetary# Nebula

  Posted September 16, 2012 7:59 PM

• by newolder

  thanks elizabeth. 😃 local to milky way environs then? :ask:

  Posted September 17, 2012 3:17 PM