Researchers at Nagoya University in Japan have discovered that Cepheid variable stars in our neighboring galaxy, the Small Magellanic Cloud (SMC), are moving in opposing directions along two ...

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

Hubble identifies a new galaxy 1924. Photo: Andromeda nebula plate with Hubble's handwritten circle around the variable star he discovered. In 1919 American astronomer Edwin Hubble began work at ...

The Cepheid variable star V1 is indicated with an arrow, and four inset images show the star’s variable brightness over several weeks. It helped determine that Andromeda was another galaxy ...

Dark matter ‘galaxy’ may be holding four stars together beyond the edge of the Milky Way. DON’T look now. There’s an entire invisible galaxy lurking right next door.

A century ago, humans didn't know other galaxies existed. Here's how Edwin Hubble changed that view. ... Cepheid variables that he identified in our galaxy were the first rung.

Edwin Hubble gets all the credit for this discovery, but Henrietta Leavitt discovered the Cepheid variables in Andromeda and did most of the labor-intensive legwork. The Andromeda Galaxy and the ...

Hubble worked hard, taking images of spiral nebulae every clear night and looking for the telltale variations of Cepheid variables. By the end of 1924, he had found 12 Cepheids in M31.

That’s where galaxies like UGC 9391 come in, which both contains cepheid variable stars and recently hosted a Type Ia supernova. This week’s image from the Hubble Space Telescope shows this ...

Now, astronomers led by Yang Huang of the Chinese Academy of Sciences have used another, more accurate tracer in the form of Cepheid variable stars to make the most accurate measure of the warp's ...