About a century ago, astronomer Edwin Hubble discovered that what was once thought to be a “spiral nebula” was actually an entirely separate galaxy, located approximately 2.5 million light-years away ...

A century after Edwin Hubble’s remarkable discovery ... Because Hubble is designed for pinpoint accuracy rather than wide-field imaging, assembling a complete portrait of Andromeda was an immense ...

A hundred years ago, astronomer Edwin Hubble made a groundbreaking discovery by proving ... It took over 10 years to make this vast and colorful portrait of the galaxy, requiring over 600 Hubble ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

Chris Impey does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

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 ...

Since Hubble’s launch, astronomers have discovered over 1 trillion galaxies, but Andromeda stands out as the closest and most ...

Astronomers have released the most detailed image of the Andromeda galaxy with new clues about its evolutionary history to celebrate the 100th anniversary of Edwin Hubble's discovery that our ...