There's no denying that something massive lurks at the heart of the Milky Way galaxy, but a new study asks whether a supermassive black hole is the only possible explanation.
There's no denying that something massive lurks at the heart of the Milky Way galaxy, but a new study asks whether a supermassive black hole is the only possible explanation.
All measurements taken of the galactic center to date are consistent with a... [5203 chars]