Research conducted in the fields of astronomy, stellar cartography, and astrophysics has yielded some interesting findings concerning the origin of a supernova remnant [an oval shell of stellar gas some 30 light years across and located near the galactic core].

Though unremarkable as such remnant's go [such remnants can be produced when an exploding stellar body releases sufficient quantities of high energy gases which in turn collide with the surrounding interstellar gases. Such collisions have been calculated to produce forces equal to 103 4 tons of trinitrotoluene.

Such consequential effects of similar explosions typically thrust a plume of gas outwards, thus carving out the characteristic immense sphere of empty space within the supernova remnant. However, in the area this stellar body once resided, it would require a far greater detonation to create the same effect [considering the density of the gases within the core of the Milky Way].

It has been theorized that some tens of thousands of years ago, Sagittarius A East was ripped apart as it passed to close to a massive black hole. Observations made of the region [following the trajectories of stars orbiting in the galactic core] tend to suggest an object of approximately one million solar masses.