News tagged with distant galaxy

The Cosmic Distance Scale

(PhysOrg.com) -- In 1908, Harvard astronomer Henrietta Swan Leavitt discovered that a class of stars called Cepheids have brightnesses that vary regularly with periods that are directly related to their intrinsic ...

Jan 29, 2010 4.6 / 5 (19) 0 | with audio podcast

A 3-D view of remote galaxies

For decades, distant galaxies that emitted their light six billion years ago were no more than small specks of light on the sky. With the launch of the Hubble Space Telescope in the early 1990s, astronomers ...

Mar 10, 2009 4.7 / 5 (18) 4