Here's what we know about it:

* Massive: It's about 4 million times the mass of our sun.

* Active: While it's not actively feeding on a lot of material right now, it does show signs of activity.

* Not a threat: It's far enough away from us that it poses no danger to Earth.

In addition to Sgr A*, the galactic center is also a very active region, with:

* Dense star clusters: Stars are packed much closer together in this region than in the rest of the galaxy.

* Gas and dust clouds: These are being pulled towards the black hole and are heated to extreme temperatures.

* Strong magnetic fields: These are generated by the intense activity in the galactic center.

Scientists continue to study this fascinating region to learn more about the formation and evolution of galaxies, as well as the nature of black holes.