From rare cosmic phenomena like Einstein Rings to dazzling starburst regions in spiral galaxies, each image offers a glimpse ...

They superficially resemble normal spiral galaxies, but something violent is going on in their central regions. They seem to have much in common with the most powerful radio sources known, the quasars ...

Optical and Spitzer IR light curves of the Seyfert galaxy NGC6418. A strong flare was observed in this object, which was accompanied by a dramatic increase in the strengths of the broad emission lines ...

In addition to being a well-defined spiral galaxy, MCG-01-24-014 has an extremely energetic core known as an active galactic nucleus (AGN) and is categorized as a Type-2 Seyfert galaxy.

A cataclysmic energy flare ripped through our galaxy, the Milky Way, about 3.5 million years ago, a team of astronomers say. The so-called Seyfert flare started near the supermassive black hole in ...

115, No. 807, May 2003 Ultraviolet and Optical Properties of Na... ABSTRACT Narrow‐line Seyfert 1 galaxies (NLS1s) are remarkable for their extreme continuum and emission‐line properties, which are ...