'Edwin powell hubble' presentation slideshows

Space Unit

Space Unit. Scientists. Ptolemy (85 A.D.-165 A.D.). Lived in Egypt but was from Greece. Was the most influential astronomer, mathematician and geographer of his time. Geocentric Model. Ptolemy believed all the planets and the sun circled the earth.

151 views • 15 slides

History of Astronomy

229 views • 11 slides

Astronomers

365 views • 10 slides

Galaxy motions

Galaxy motions. At the start of the 20 th century, the new technique of spectroscopy, allied with the large telescopes which had begun to become available, enabled observers to use the shifting of spectral lines to measure the velocities of galaxies.

108 views • 10 slides