It is obscured by vast clouds of gas and dust in the constellation of Sagittarius.

BBC: By BBC News Online Science Editor Dr David Whitehouse

He notes it could be part of the Sagittarius stream, a remnant of the Sagittarius dwarf galaxy, long assumed to be one of the building blocks of our own Milky Way.

FORBES: Astronomers Confirm Milky Way's Most Distant Stellar Stream