Sagittarius A*
= Sagittarius A\*
{c}
{wiki}
= Sgr A\*
{c}
{synonym}
<Sagittarius A*> is the compact radio source at the centre of the <Milky Way>. Nearby <infrared> <stars> allow its central mass concentration to be studied through their <orbits>.<Closest Star Seen Orbiting the Supermassive Black Hole at the Centre of the Milky Way by Rainer Schödel and others>[PDF pp.2–3, radio/infrared registration and stellar orbits]{ref}