The Andromeda galaxy helped Edwin Hubble settle a great debate in astronomy. Stocktrek Images via Getty Images A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known ...

Crater 2, located approximately 380,000 light years from Earth, is one of the largest satellite galaxies of the Milky Way. Extremely cold and with slow-moving stars, Crater 2 has low surface ...

The supermassive black hole named Sagittarius A* lies in the middle of the Milky Way. Observations of S2 and other stars also helped astronomers calculate the extraordinary size and mass of ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

Chinese astronomers have revealed new findings about the size of the Milky Way galaxy, suggesting it’s significantly larger than previously thought. Their research, published in the prestigious ...

Give them a constellation prize. A group of international scientists discovered three ultra-massive “Red Monster” galaxies capable of forming their own stars faster than the average nebula. The ...

Astronomers made a remarkable discovery—one of the biggest pair of jets that appear to shoot from behind a supermassive black hole 7.5 billion light-years from Earth. Using some quick arithmetic, ...

The newly discovered giant radio galaxy "Inkathazo." The glowing plasma jets, as seen by the MeerKAT telescope, are shown in red and yellow. The starlight from other surrounding galaxies can be seen ...

For the study, the researchers analyzed 214 of the most massive stars in the Milky Way.

The warp in the Milky Way's spiral disk is precessing backward under the influence of the enormous mass of dark matter that forms an invisible halo around our galaxy, Chinese astronomers have ...