here is something for Scientific American about it too........
The historic image of Sagittarius A* is the culmination of a decades-long astronomical quest—and a crucial step toward a new understanding of black holes, gravity and spacetime
www.scientificamerican.com
now if you wanna find it youself...first you must find Sagittarius constilation.....look for the bow and arrow....follow the arrow to the milky way and there it is the center of our galaxy......(and if you use a telescope there is a lot of hidden stuff there, Nebula's, clusters...etc)
en.wikipedia.org
once you follow the arrow to it here you will find Sag A....
en.wikipedia.org
enjoy the night sky....