http://www.telescope.org/pparc/res8.html http://www.telescope.org/pparc/res8.html http://www.telescope.org/pparc/res8.html telescope.org Telescope.org http://www.telescope.org/pparc/res8.html http://www.telescope.org/pparc/res8.html http://www.telescope.org/pparc/res8.html http://www.telescope.org/pparc/res8.html The University of Bradford: The Life Cycle of a Star http://www.telescope.org/pparc/res8.html The Life Cycle of a Star