http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?docsPerPage%3D100;f4-associated-Lesson%3DGamma%20Ray%20Science;f5-type%3DArtwork Results for your query: docsPerPage=100;f4-associated-Lesson=Gamma Ray Science;f5-type=Artwork Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/165469main_403GRBCollapsarModelPar_NASAWebV_1/165469main_403GRBCollapsarModelPar_NASAWebV_1.dc.xml The collapsing star scenario that is one of the leading contenders as the cause of gamma-ray bursts. This artist's concept of the collapsar model shows the center of a dying star collapsing minutes before the star implodes and emits a gamma-ray burst that is seen across the universe. Many scientists say longer bursts (more than four seconds in duration) are caused by massive star explosions. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/165469main_403GRBCollapsarModelPar_NASAWebV_1/165469main_403GRBCollapsarModelPar_NASAWebV_1.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/500px-Alfa_beta_gamma_radiation_penetration.svg/500px-Alfa_beta_gamma_radiation_penetration.dc.xml Gamma radiation (which includes gamma rays, X-rays, and ultraviolet radiation) cannot penetrate our atmosphere, but can travel through materials such as paper and aluminum. Only heavy metals (such as lead) and other materials like concrete can block gamma rays. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/500px-Alfa_beta_gamma_radiation_penetration.svg/500px-Alfa_beta_gamma_radiation_penetration.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/fig-26-ems-big/fig-26-ems-big.dc.xml Scale illustrating the order and size of the wavelengths in each band of the electromagnetic spectrum. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/fig-26-ems-big/fig-26-ems-big.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/firststars/firststars.dc.xml An artist's concept of the first stars forming after the Big Bang. The first stars should have been supermassive and metal poor stars that would end with a collapsar and a GRB, but there is currently no evidence of these earliest GRBs. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/firststars/firststars.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/gamma-ray_bursts/gamma-ray_bursts.dc.xml This graphic illustrates the different sources and processes that result in long and short gamma-ray bursts. The left panel shows the collapse of a giant star that is thought to lead to a long GRB. The right panel shows the inspiral and coalescence of two neutron stars, which is thought to result in a short GRB. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/gamma-ray_bursts/gamma-ray_bursts.dc.xml Thu, 01 Jan 1970 12:00:00 GMT