Our Milky Way is one of more than 100 galaxies bound together by gravity.

Located a billion light years from Earth, IC 1101 is the largest known galaxy with a diameter of 6 million light years or at least 60 times the size of the Milky Way.

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 ...

It's the second picture of a black hole from the Event Horizon Telescope, an international collaboration of radio observatories.

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 ...

NASA's Hubble Space Telescope has captured a stunning new image of, NGC 474, an elliptical galaxy that's 2.5 times larger than our Milky Way.

The Milky Way's black hole is huge compared to the black holes left behind when massive stars die. But astronomers think there are supermassive black holes at the center of nearly all galaxies.

NASA's Hubble Space Telescope has captured a stunning new image of a galaxy that's over twice the size of our Milky Way. According to NASA, the gigantic elliptical galaxy (dubbed NGC 474) sits ...

M11 is best viewed in the hours between sunset and midnight in August, when the cluster can be found roughly 40 degrees above ...