What's the size of the Milky Way galaxy? Learn how, depending on your definition, the size can change.

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 ...

From our vantage point inside it, the Milky Way can feel infinite, a hazy river of light that wraps around the sky. Yet when ...

Astronomers have discovered an extraordinary new giant radio galaxy with plasma jets 32 times the size of our Milky Way. Measuring 3.3 million light-years from end-to-end, the cosmic megastructure was ...

Astronomers have identified a colossal giant radio galaxy (GRG) stretching 3.3 million light-years across—32 times the size ...

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 ...

What does the Milky Way look like? Sometimes, the billions of stars comprising our home galaxy appear especially vibrant during “Milky Way season” as the band arcs across the night sky. The reason has ...

The Milky Way is our home galaxy with a disc of stars that spans more than 100,000 light-years. While the Milky Way is generally always visible from Earth, certain times of year are better for ...

The Milky Way is warped, possibly as the result of a collision with another galaxy billions of years ago. Studying this warp could reveal more about the structure of our galaxy's hidden matter. When ...

The Milky Way galaxy, comprised of billions of stars, will be visible in the night sky until the end of May, particularly between the last quarter moon (May 20) and the new moon (May 30). Light ...

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 ...