How did a Cepheid variable star help Edwin Hubble prove the Andromeda Nebula was a galaxy? Roger BradySan Quentin, California ...

Scientists have proposed a wild new theory at the Royal Astronomical Society's National Astronomy Meeting (NAM) in Durham - Earth, along with the entire Milky Way galaxy, may be situated within a ...

Earth and our entire Milky Way galaxy may sit inside a mysterious giant hole which makes the cosmos expand faster here than ...

A hundred years ago, astronomer Edwin Hubble revealed a universe of galaxies that existed beyond ours. His influence in astronomy continues to this day.

Baryon acoustic oscillations (BAOs) – the “sound of the Big Bang” – support the idea of a local void. Gabriela Secara, ...

Astronomers suggest Earth may sit in a giant cosmic void. This could explain the faster local universe expansion, known as 'Hubble tension.' ...

Edwin Hubble uses the telescope at the Mount Wilson Observatory. Photo by Ann Ronan Pictures/Print Collector/Getty Images Print Collector. Estimating distances in astronomy is challenging.

The Andromeda galaxy is also known as Messier 31. It is a spiral galaxy located about 2.5 million light-years from Earth. On ...

In commemoration of Edwin Hubble's discovery of a Cepheid variable class star, called V1, in the neighboring Andromeda galaxy 100 years ago, astronomers partnered with the American Association of ...