Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile have discovered "signs of a ‘hot spot’ orbiting Sagittarius A*," according to the European Southern Observatory (ESO) ...

If a star orbits a black hole, it will appear from a distance to be orbiting empty space. Gaia projects the star’s orbit on a ...

Galaxies are astronomical objects composed of billions or even trillions of stars. Our Earth and solar system are just a tiny ...