3 peas ?

• by bluemagi

  Middle one has a high Na,NI,NI.? The one on the Left looks like a star but I'll question that? The hazy one at 4:00 looks green.

  Posted January 29, 2016 6:46 AM

• by Budgieye moderator

  Not Na, but Hα which is hydrogen alpha emission. Yes, object on left is a star. Object at 4 is a distant galaxy, but I don't see green on my screen.

  See Balmer series on Wikipedia.

  

  Hα
  Hβ
  H γ
  H δ
  Hε
  Hζ
  Hη
  Hθ

  

  http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?ra=128.1989056914383&dec=30.569935055817943

  Posted January 30, 2016 7:42 AM