Portal:Astronomy/Picture/26 July 2005
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Seyfert_Galaxy_NGC_7742.jpg/300px-Seyfert_Galaxy_NGC_7742.jpg)
NGC 7742 is a spiral galaxy with a prominent yellow nucleus surrounded by spiral arms containing many young, hot blue stars. It is a Seyfert galaxy, a type of active galaxy powered by a super-massive black hole at the centre, and first studied by astronomer Carl Seyfert in the 1940s.