Astronomy Question of the Week: How quickly is the Universe expanding?

In the 1920s, Edwin Powell Hubble was analysing the distances between Earth and various galaxies using the Mount Wilson Observatory in California. In the process, he measured the electromagnetic radiation of the galaxies and discovered mostly what are known as ‘redshifts’ in their spectra; that is, in the distributions of the various wavelengths. (...)Read the [...]

Full story at http://spacefellowship.com/2009/09/21/astronomy-question-of-the-week-how-quickly-is-the-universe-expanding/