Discovery of New Faint Northern Galactic Planetary Nebulae
  We present the discovery of 6 nebular objects made by amateur astronomers. Four of these discoveries are clearly planetary nebulae (PNe), one is a possible PN, and another is a likely H II region. The bipolar nebula Ou4 presents the largest angular extent ever found : over one degree on the sky! We consider various scenarios that could explain such a nebula. Ou4 could be one of the nearest PNe known, though its possible PN nature will need confirmation. 
Agnes Acker, Henri M. J. Boffin, Nicolas Outters, Brent Miszalski,   Laurence Sabin, Pascal Le Du, and Filipe Alves
astro-ph.SR physics.pop-ph