Add Yahoo as a preferred source to see more of our stories on Google. An image of the Cepheid variable star RS Puppis. An image of the Cepheid variable star RS Puppis. The most accurate observation to ...

Comparison of simulation of three main star forming episodes in the spiral arms with the currently observed Cepheid variables. Oldest stars (red) are 400 million years old and the youngest (blue) are ...

Today's ESA/Hubble Picture of the Week features a galaxy that Hubble has captured multiple times over more than 20 years. The galaxy is called NGC 3370, and it is a spiral galaxy located nearly 90 ...

Publications of the Astronomical Society of the Pacific, Vol. 119, No. 854 (April 2007), pp. 398-406 (9 pages) ABSTRACT We introduce a simple method for determining pulsation velocities of Cepheid ...

A new analysis of pulsing stars has revealed the Milky Way’s twisted shape. Scientists have known since the 1950s that the spiral-shaped Milky Way’s disk is warped, bending by thousands of light-years ...

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 ...

A trio of brightly pulsating stars at the outskirts of the Milky Way is racing away from the galaxy and may confirm a method for detecting dwarf galaxies dominated by dark matter and explain ripples ...

How is astronomical distance determined? Just cannot get my head around cepheid variables, parallax, etc. How is it possible to tell how far away something is when you cannot bounce a radar beam off ...

Ninety years ago, Harvard astronomer Henrietta Leavitt spent years painstakingly examining thousands of sky photographs to search for and study variable stars. Her laborious hunt led to the discovery ...

Yardsticks are very useful around the house when you need a measurement. (I have also used them to fish out toys the cat knocked under a low piece of furniture.) They are standards by which we can ...

Astronomers from the University of Warsaw, Poland and elsewhere have detected a new classical Cepheid variable star. The newfound star, which received designation OGLE-GD-CEP-1884, has the longest ...