Two supernovae have been observed in NGC 3079: SN 2001ci (type Ic, mag. 18.3),[4] and SN 2013ee (type II, mag. 15.5).[5]
Center Bubble
The bubble forming in the center of NGC 3079 is believed to be about 3000 light-years wide and to rise more than 3500 light-years above the disc of the galaxy. It is speculated that the bubble is being formed by particles streaming at high speeds, which were in turn caused by a large burst of star formation. This current bubble is thought to have been created about one million years ago, and computer modeling suggests that there is an ongoing cycle of forming bubbles, with a new bubble forming approximately every 10 million years.
Hubble space telescope, (visible light) Seyfert galaxy NGC 3079. This image shows the lumpy bubble of hot gas located at the center of the NGC 3079 galaxy's disk
^Graham, Alister W. (November 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013, S2CID89905.